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Transaction in Own Shares

9th Feb 2017 17:38

RNS Number : 5453W

National Grid PLC

09 February 2017

9 February 2017

National Grid plc ("National Grid")

ISIN Code: B00B08SNH3

Transaction in Own Shares

National Grid announces that it has purchased the following number of its Ordinary shares of 1117/43p each on the London Stock Exchange from Merrill Lynch International ("MLI") as part of its buy-back programme announced on 6 February 2017.

Date of purchase:	9 February 2017
Number of Ordinary shares of 1117/43p each purchased:	500,000
Highest price paid per share (pence):	965.0421
Lowest price paid per share (pence):	965.0421
Volume weighted average price paid per share	965.0421

National Grid intends to hold the purchased shares in treasury. Following the purchase of these shares, National Grid holds 192,015,284 of its Ordinary shares in treasury and has 3,750,968,163 Ordinary shares in issue (excluding treasury shares).

In accordance with Article 5(1)(b) of Regulation (EU) No 596/2014 (the "Market Abuse Regulation"), a schedule of individual trades by MLI on 9 February 2017 is set out below.

Schedule of purchases - individual transactions

Transaction Time	Price per share (p)	Quantity of shares purchased
Transaction Time	Price per share (p)	Quantity of shares purchased
08:09:13	959.60	56
08:09:13	959.60	531
08:09:13	959.60	804
08:10:27	960.70	118
08:10:27	960.70	682
08:10:27	960.70	800
08:10:33	960.70	188
08:10:41	960.70	99
08:10:41	960.70	703
08:10:44	960.70	750
08:12:23	962.10	378
08:12:27	962.40	807
08:12:29	962.40	142
08:12:29	962.40	807
08:12:41	962.10	426
08:13:01	962.10	60
08:13:01	962.10	804
08:13:11	961.70	268
08:13:11	961.70	275
08:13:11	961.70	537
08:14:42	964.20	1
08:14:53	964.20	303
08:15:42	964.20	103
08:15:42	964.20	282
08:15:42	964.20	496
08:15:43	964.20	264
08:15:43	964.20	415
08:15:47	964.20	802
08:16:08	965.20	491
08:16:08	965.20	1000
08:16:54	965.40	226
08:17:25	966.30	138
08:17:25	966.30	226
08:17:25	966.30	371
08:17:25	966.30	520
08:17:25	966.30	617
08:18:20	967.20	653
08:18:20	967.20	786
08:18:50	967.40	200
08:18:50	967.40	285
08:18:50	967.40	400
08:18:50	967.40	788
08:19:16	967.20	185
08:19:16	967.20	352
08:19:16	967.20	619
08:19:16	967.20	619
08:20:14	966.20	93
08:20:14	966.20	96
08:20:14	966.20	99
08:20:14	966.20	449
08:20:20	966.20	68
08:20:21	966.20	565
08:20:58	967.20	258
08:20:58	967.20	804
08:20:58	967.20	804
08:21:25	966.20	3
08:21:25	966.20	153
08:21:25	966.20	240
08:23:21	966.30	124
08:23:22	966.30	55
08:23:22	966.30	124
08:23:22	966.30	680
08:23:22	966.30	680
08:24:43	965.80	79
08:24:43	965.80	386
08:24:43	965.80	417
08:24:43	965.80	803
08:24:44	965.60	409
08:24:45	965.60	392
08:24:46	965.60	22
08:24:46	965.60	801
08:25:10	964.90	777
08:25:10	964.90	804
08:27:27	965.20	571
08:27:27	965.20	618
08:28:15	965.50	4
08:28:15	965.50	6
08:28:15	965.40	300
08:28:15	965.50	792
08:28:15	965.50	800
08:30:17	966.40	212
08:30:17	966.40	804
08:30:17	966.40	804
08:30:20	966.30	741
08:30:20	966.30	807
08:31:31	964.00	106
08:31:31	964.00	638
08:31:31	964.00	701
08:34:20	965.40	1000
08:34:39	965.00	90
08:34:39	965.00	116
08:34:39	965.00	802
08:34:39	965.00	802
08:35:33	964.90	101
08:35:33	964.90	699
08:35:33	964.90	805
08:38:23	966.00	374
08:38:23	966.00	538
08:38:23	966.00	802
08:38:24	965.80	804
08:39:22	966.70	220
08:39:22	966.70	804
08:39:53	966.80	683
08:39:53	966.80	805
08:41:45	967.00	32
08:41:45	967.00	773
08:41:45	967.00	906
08:42:15	966.40	95
08:42:15	966.40	705
08:42:15	966.40	769
08:45:22	968.20	722
08:45:22	968.20	806
08:47:07	968.70	17
08:47:07	968.70	288
08:47:07	968.70	514
08:47:07	968.70	802
08:48:10	969.30	8
08:48:10	969.30	68
08:48:10	969.30	801
08:48:10	969.30	801
08:49:03	969.10	152
08:49:03	969.10	624
08:49:03	969.10	801
08:50:49	968.90	36
08:50:49	968.90	800
08:50:49	968.90	800
08:53:08	968.80	27
08:53:08	968.80	59
08:53:08	968.80	100
08:53:08	968.80	100
08:53:08	968.80	100
08:53:08	968.80	100
08:53:08	968.80	100
08:53:09	968.80	100
08:53:09	968.80	100
08:53:09	968.80	121
08:53:09	968.80	793
08:54:19	969.70	148
08:54:19	969.70	581
08:54:19	969.70	803
08:57:26	971.60	4
08:57:26	971.60	518
08:57:26	971.60	1000
08:57:41	971.20	1565
08:58:30	969.90	151
08:58:30	969.90	586
08:58:30	969.90	805
09:00:42	968.30	688
09:00:42	968.30	802
09:04:16	968.50	197
09:04:16	968.50	802
09:04:16	968.50	802
09:04:34	968.40	90
09:04:34	968.40	804
09:04:34	968.40	804
09:05:44	967.80	183
09:05:44	967.80	805
09:05:44	967.80	805
09:07:58	966.90	92
09:07:58	966.90	175
09:07:58	966.90	628
09:07:58	966.90	803
09:08:54	966.70	428
09:08:54	966.70	555
09:08:54	966.70	805
09:09:48	965.80	327
09:09:48	965.80	474
09:09:48	965.80	804
09:13:11	967.00	151
09:13:11	967.00	801
09:13:11	967.00	801
09:14:19	967.30	72
09:14:19	967.30	651
09:14:19	967.30	728
09:15:29	967.00	453
09:15:30	967.00	351
09:15:30	967.00	378
09:17:48	967.40	802
09:20:48	969.10	1
09:20:48	969.00	36
09:20:48	969.00	106
09:20:48	969.00	203
09:20:48	969.00	203
09:20:48	969.00	600
09:20:48	969.00	697
09:20:48	969.10	804
09:20:48	969.10	804
09:22:16	969.00	500
09:22:17	969.00	305
09:22:20	969.00	109
09:22:20	969.00	305
09:22:20	969.00	500
09:24:16	968.50	100
09:24:16	968.50	100
09:24:16	968.50	100
09:24:16	968.50	100
09:24:16	968.50	100
09:24:16	968.50	442
09:24:16	968.50	502
09:26:53	969.00	2
09:26:53	969.00	71
09:26:53	969.00	807
09:26:53	969.00	807
09:28:09	969.00	66
09:28:09	969.00	116
09:28:09	969.00	737
09:28:09	969.00	801
09:28:57	968.30	795
09:28:57	968.30	806
09:29:45	968.50	800
09:31:30	969.10	232
09:31:30	969.10	408
09:32:14	969.10	805
09:32:23	969.10	176
09:32:23	969.10	629
09:32:23	969.00	738
09:32:23	969.10	800
09:32:23	969.00	804
09:32:23	969.10	993
09:33:37	969.80	689
09:33:37	969.80	805
09:37:14	968.80	103
09:37:14	968.80	801
09:37:14	968.80	801
09:38:10	968.80	15
09:38:10	968.80	769
09:38:10	968.80	806
09:40:21	968.90	803
09:41:18	969.10	803
09:41:19	969.10	84
09:42:10	969.00	110
09:42:10	969.00	532
09:42:10	969.00	802
09:44:49	970.40	100
09:44:49	970.40	100
09:44:49	970.40	114
09:44:49	970.40	707
09:44:50	970.40	110
09:44:50	970.40	309
09:45:27	970.50	95
09:45:27	970.50	805
09:45:27	970.50	805
09:45:31	970.30	270
09:45:31	970.30	806
09:47:21	970.50	281
09:47:22	970.50	519
09:47:22	970.50	736
09:50:55	970.70	131
09:50:55	970.70	238
09:50:55	970.70	475
09:50:55	970.70	835
09:51:37	970.30	452
09:51:38	970.30	190
09:52:44	970.10	29
09:52:44	970.10	803
09:52:44	970.10	803
09:54:54	969.50	708
09:54:54	969.50	801
09:56:52	968.40	118
09:56:52	968.40	164
09:56:52	968.40	164
09:56:52	968.40	164
09:56:52	968.40	522
09:56:52	968.40	640
09:59:43	968.50	166
09:59:43	968.50	600
09:59:43	968.50	800
10:00:52	968.20	793
10:00:52	968.20	800
10:02:30	968.40	145
10:02:30	968.40	661
10:02:30	968.40	687
10:06:14	968.10	94
10:06:14	968.10	800
10:06:14	968.10	800
10:06:53	967.30	34
10:06:53	967.30	682
10:06:53	967.30	806
10:12:07	967.50	30
10:12:07	967.50	55
10:12:07	967.50	266
10:12:07	967.50	487
10:12:07	967.50	800
10:12:07	967.50	806
10:12:07	967.50	806
10:14:17	966.80	801
10:14:17	966.80	801
10:14:47	966.80	52
10:16:00	966.50	380
10:16:00	966.50	395
10:16:00	966.50	406
10:16:00	966.50	406
10:19:05	966.80	75
10:19:05	966.80	691
10:19:05	966.80	729
10:24:09	967.40	40
10:24:09	967.40	129
10:24:09	967.30	804
10:24:09	967.40	806
10:24:09	967.40	806
10:24:10	967.30	181
10:24:10	967.30	804
10:28:25	967.50	295
10:28:25	967.50	364
10:28:25	967.40	719
10:28:25	967.50	802
10:28:25	967.40	805
10:31:06	967.40	804
10:31:06	967.40	807
10:31:58	967.00	106
10:31:58	967.00	266
10:31:58	967.00	291
10:31:58	967.00	318
10:31:58	967.00	541
10:35:35	966.90	297
10:35:35	966.90	478
10:35:35	966.90	803
10:37:20	966.80	33
10:37:20	966.80	248
10:37:20	966.80	395
10:37:20	966.80	771
10:39:32	967.00	176
10:39:32	967.00	801
10:39:32	967.00	801
10:44:08	967.00	33
10:44:08	967.00	174
10:44:08	967.00	631
10:44:08	967.00	805
10:44:17	966.90	54
10:44:17	966.90	301
10:44:17	966.90	574
10:44:17	966.90	750
10:46:46	966.40	164
10:46:46	966.40	391
10:46:46	966.40	409
10:46:46	966.40	800
10:49:31	967.00	241
10:49:31	967.00	562
10:49:31	967.00	765
10:52:58	967.30	655
10:52:58	967.30	800
10:54:26	967.20	56
10:54:26	967.20	800
10:54:26	967.20	800
10:56:47	967.30	654
10:56:47	967.30	802
11:01:54	967.30	206
11:01:54	967.30	802
11:01:57	967.30	129
11:01:57	967.30	596
11:03:04	967.10	238
11:03:04	967.10	250
11:03:04	967.10	315
11:03:04	967.10	803
11:03:10	967.10	214
11:06:09	966.80	233
11:06:09	966.80	500
11:06:09	966.80	802
11:11:42	967.40	191
11:11:42	967.40	199
11:11:42	967.40	245
11:11:42	967.40	561
11:11:42	967.40	615
11:12:37	967.40	158
11:12:37	967.40	311
11:12:37	967.40	343
11:12:37	967.40	460
11:12:37	967.40	492
11:13:45	967.30	155
11:13:45	967.30	328
11:13:45	967.30	649
11:15:14	967.30	300
11:15:17	967.30	296
11:17:07	966.50	175
11:17:07	966.50	804
11:17:07	966.50	804
11:19:50	966.10	805
11:21:37	966.10	72
11:21:37	966.10	805
11:23:15	965.40	632
11:23:15	965.40	803
11:25:43	965.00	147
11:25:43	965.00	804
11:25:43	965.00	804
11:32:13	965.90	118
11:32:13	965.90	148
11:32:13	965.90	655
11:32:13	965.80	715
11:32:13	965.90	803
11:32:13	965.80	807
11:38:20	966.70	231
11:38:20	966.70	805
11:38:20	966.70	805
11:38:21	966.60	190
11:38:21	966.60	613
11:38:21	966.60	776
11:41:20	967.60	115
11:41:20	967.60	803
11:41:20	967.60	803
11:47:50	968.60	300
11:47:50	968.60	502
11:47:50	968.60	802
11:47:54	968.60	51
11:50:07	968.70	807
11:50:12	968.70	790
11:51:32	968.40	196
11:51:32	968.40	196
11:51:32	968.40	605
11:51:32	968.40	801
11:51:55	968.40	52
11:56:34	968.70	228
11:56:34	968.70	806
11:56:34	968.70	806
11:57:00	968.30	746
11:58:49	968.50	172
11:59:06	968.50	532
11:59:06	968.50	635
11:59:58	968.30	59
11:59:58	968.30	67
11:59:58	968.30	497
11:59:59	968.30	64
12:02:55	968.60	458
12:02:57	968.60	247
12:03:01	968.60	100
12:03:01	968.60	104
12:03:01	968.60	637
12:04:12	968.50	75
12:04:12	968.50	801
12:04:12	968.50	801
12:08:19	967.60	180
12:08:19	967.60	804
12:08:19	967.60	804
12:11:30	967.70	41
12:11:30	967.70	101
12:11:30	967.70	704
12:11:30	967.70	805
12:13:14	968.40	6
12:13:14	968.40	802
12:13:14	968.40	802
12:16:27	968.60	74
12:16:27	968.60	242
12:16:27	968.60	242
12:16:27	968.70	372
12:16:27	968.70	408
12:16:27	968.60	486
12:16:27	968.60	540
12:16:27	968.70	804
12:20:39	968.70	802
12:20:41	968.70	655
12:22:06	968.50	803
12:22:15	968.50	793
12:27:01	967.80	101
12:27:01	967.80	127
12:27:01	967.80	261
12:27:01	967.80	544
12:27:01	967.80	805
12:27:30	967.50	100
12:27:30	967.50	492
12:28:15	967.50	32
12:28:15	967.50	213
12:28:15	967.50	805
12:34:06	968.10	671
12:34:06	968.20	801
12:34:06	968.10	806
12:34:06	968.20	986
12:35:47	968.20	803
12:35:47	968.20	890
12:39:38	968.30	803
12:42:03	968.70	42
12:42:03	968.60	390
12:42:03	968.60	414
12:42:03	968.60	757
12:42:03	968.70	764
12:42:03	968.70	803
12:42:03	968.70	803
12:47:15	969.60	72
12:47:15	969.60	805
12:47:15	969.60	805
12:49:01	969.90	805
12:49:12	969.90	692
12:49:38	969.70	161
12:49:38	969.70	206
12:49:38	969.70	395
12:49:38	969.70	412
12:49:38	969.70	601
12:52:30	969.40	711
12:52:30	969.40	807
12:53:36	969.80	801
12:54:05	969.80	103
12:54:05	969.80	801
12:55:40	970.10	706
12:55:40	970.10	800
12:58:08	969.80	50
12:58:08	969.80	640
12:58:08	969.80	755
12:59:08	969.40	294
12:59:08	969.40	508
12:59:09	969.40	779
13:01:57	968.30	81
13:01:57	968.30	169
13:01:57	968.30	719
13:01:57	968.30	723
13:05:26	969.10	65
13:05:34	969.10	102
13:05:34	969.10	235
13:05:34	969.10	698
13:05:34	969.10	735
13:08:15	967.40	709
13:08:15	967.40	805
13:10:10	967.00	785
13:10:31	967.00	21
13:10:31	967.00	164
13:11:02	967.00	209
13:11:02	967.00	297
13:12:54	966.70	27
13:12:54	966.70	804
13:12:54	966.70	804
13:16:00	966.80	53
13:16:00	966.80	336
13:16:00	966.80	464
13:16:00	966.80	800
13:21:36	966.90	44
13:21:36	966.90	55
13:21:36	966.90	86
13:21:36	966.90	86
13:21:36	966.90	97
13:21:36	966.90	123
13:21:36	966.80	310
13:21:36	966.80	360
13:21:36	966.80	380
13:21:36	966.80	443
13:21:36	966.90	577
13:21:36	966.90	584
13:24:39	967.30	376
13:24:39	967.30	429
13:24:39	967.30	686
13:26:59	966.80	178
13:26:59	966.80	203
13:26:59	966.80	222
13:26:59	966.80	600
13:26:59	966.80	625
13:29:31	967.30	748
13:29:31	967.30	805
13:31:07	966.40	240
13:31:07	966.40	561
13:31:07	966.40	662
13:33:56	967.30	69
13:33:56	967.30	147
13:33:56	967.30	655
13:33:56	967.30	802
13:35:47	967.70	49
13:35:47	967.70	74
13:35:47	967.70	392
13:35:47	967.70	413
13:35:47	967.70	731
13:35:52	967.30	84
13:35:52	967.30	97
13:35:52	967.30	225
13:35:52	967.30	482
13:35:52	967.30	804
13:37:54	967.60	4
13:37:54	967.60	133
13:37:54	967.60	673
13:37:54	967.60	673
13:38:50	967.20	801
13:38:50	967.20	855
13:42:59	967.90	800
13:43:00	967.90	800
13:44:00	968.10	802
13:44:32	968.10	91
13:44:32	968.10	802
13:44:45	967.90	208
13:47:00	968.30	803
13:47:01	968.30	801
13:48:58	968.80	206
13:49:16	968.80	67
13:49:16	968.80	178
13:49:16	968.80	356
13:50:28	968.70	22
13:50:28	968.70	25
13:50:28	968.70	78
13:50:28	968.70	78
13:50:28	968.80	238
13:50:28	968.70	378
13:50:28	968.70	422
13:50:28	968.70	722
13:50:28	968.80	807
13:55:10	968.60	5
13:55:10	968.60	81
13:55:10	968.60	120
13:55:10	968.60	206
13:55:10	968.60	219
13:55:10	968.60	294
13:55:10	968.60	805
13:57:36	968.20	804
13:57:36	968.20	978
13:58:55	968.20	148
13:58:55	968.20	583
13:58:55	968.20	654
14:00:44	968.90	805
14:00:44	968.90	895
14:02:32	968.20	15
14:02:32	968.20	219
14:02:32	968.40	701
14:02:32	968.40	807
14:04:22	967.40	667
14:04:22	967.40	800
14:08:51	966.80	44
14:08:51	966.80	205
14:08:51	966.80	308
14:08:51	966.80	496
14:08:51	966.80	760
14:08:51	966.60	801
14:08:52	966.60	791
14:11:55	966.70	135
14:11:55	966.70	208
14:11:55	966.70	594
14:11:55	966.70	802
14:15:01	966.70	252
14:15:01	966.70	801
14:15:01	966.70	801
14:16:33	966.70	360
14:16:34	966.70	16
14:16:34	966.70	442
14:16:34	966.70	688
14:18:51	967.20	20
14:18:51	967.20	69
14:18:51	967.20	801
14:18:51	967.20	801
14:20:05	966.60	254
14:20:15	966.60	130
14:20:15	966.60	548
14:20:15	966.60	802
14:24:25	966.90	47
14:24:25	966.90	76
14:24:25	966.90	724
14:24:25	966.90	800
14:24:31	966.80	710
14:24:31	966.80	806
14:26:23	967.10	206
14:26:23	967.10	803
14:26:24	967.10	472
14:28:20	967.00	133
14:28:20	967.00	152
14:28:20	967.00	206
14:28:20	967.00	303
14:28:20	967.00	652
14:28:24	967.00	129
14:30:00	967.00	43
14:30:00	967.00	58
14:30:00	967.00	139
14:30:00	967.00	700
14:30:00	967.00	705
14:30:00	967.00	801
14:30:00	967.00	801
14:30:34	966.30	801
14:30:35	966.30	202
14:30:35	966.30	517
14:31:02	965.90	263
14:31:02	965.90	500
14:31:06	965.90	44
14:31:06	965.90	112
14:31:08	965.90	163
14:31:08	965.90	230
14:31:08	965.90	465
14:32:06	965.60	1
14:32:06	965.60	402
14:32:06	965.60	662
14:32:06	965.60	805
14:32:25	965.40	97
14:32:25	965.40	804
14:32:27	965.40	216
14:32:27	965.40	707
14:34:02	965.50	748
14:34:02	965.50	806
14:34:18	965.50	186
14:34:18	965.50	805
14:34:18	965.50	805
14:35:15	965.00	260
14:35:15	965.00	543
14:35:26	965.00	53
14:35:26	965.00	75
14:35:26	965.00	750
14:35:55	964.80	701
14:35:55	964.80	805
14:37:10	964.90	802
14:37:10	964.90	1051
14:37:40	965.30	680
14:37:40	965.30	805
14:39:14	965.40	472
14:39:15	965.40	20
14:39:15	965.40	266
14:39:15	965.40	332
14:39:15	965.40	538
14:39:23	965.20	272
14:39:24	965.20	294
14:39:26	965.20	228
14:39:26	965.20	238
14:40:08	965.20	437
14:40:14	965.20	329
14:40:15	965.20	26
14:40:15	965.20	144
14:40:15	965.20	474
14:40:15	965.20	500
14:41:27	965.30	806
14:41:29	965.30	700
14:41:33	965.30	9
14:41:33	965.30	106
14:42:31	965.00	100
14:42:31	965.00	172
14:42:31	965.00	805
14:42:32	965.00	16
14:42:32	965.00	100
14:42:33	965.00	500
14:42:45	965.00	17
14:42:45	965.00	135
14:43:33	963.80	320
14:43:34	963.80	384
14:43:34	963.80	486
14:43:37	963.80	272
14:43:38	963.80	79
14:44:48	963.00	110
14:44:50	963.00	690
14:44:51	963.00	300
14:44:51	963.00	500
14:44:54	963.00	151
14:48:36	963.70	19
14:48:36	963.70	806
14:48:36	963.70	806
14:48:59	963.70	801
14:49:40	963.80	390
14:49:46	963.80	6
14:49:46	963.80	32
14:49:46	963.80	45
14:49:46	963.80	61
14:49:46	963.80	234
14:49:46	963.80	320
14:49:46	963.80	411
14:49:46	963.80	483
14:49:46	963.80	802
14:49:46	963.80	802
14:49:46	963.80	850
14:50:52	963.10	806
14:50:52	963.10	809
14:51:57	962.80	263
14:52:00	962.80	69
14:52:00	962.80	73
14:52:00	962.80	292
14:52:00	962.80	396
14:52:00	962.80	439
14:52:39	962.60	122
14:52:50	962.60	151
14:52:50	962.60	685
14:52:50	962.60	807
14:53:26	962.50	93
14:53:26	962.50	800
14:53:39	962.50	572
14:54:46	962.30	807
14:55:02	962.30	34
14:55:02	962.30	807
14:55:40	962.20	222
14:55:46	962.20	33
14:55:46	962.20	37
14:55:46	962.20	580
14:55:46	962.20	802
14:55:47	962.20	44
14:57:48	962.00	166
14:57:48	962.00	805
14:57:48	962.00	805
14:58:02	961.60	367
14:58:02	961.60	438
14:58:03	961.60	805
14:58:10	961.60	19
14:59:24	961.10	583
14:59:25	961.10	218
14:59:50	961.20	266
14:59:50	961.20	801
15:00:48	962.30	204
15:00:48	962.30	220
15:00:48	962.30	587
15:00:48	962.30	664
15:00:48	962.30	807
15:00:48	962.30	807
15:02:01	963.00	192
15:02:01	963.00	200
15:02:01	963.00	200
15:02:01	963.00	209
15:02:01	963.00	235
15:02:01	963.00	463
15:02:02	963.00	103
15:02:02	963.00	254
15:03:11	961.90	500
15:03:12	961.90	49
15:03:12	961.90	307
15:03:12	961.90	337
15:03:13	961.90	414
15:05:05	960.70	800
15:05:06	960.70	38
15:05:06	960.70	113
15:05:06	960.70	649
15:05:07	960.70	263
15:05:30	960.70	40
15:05:30	960.70	200
15:05:30	960.70	801
15:05:30	960.70	801
15:06:21	960.80	89
15:06:21	960.80	203
15:06:21	960.80	327
15:06:21	960.80	427
15:06:21	960.80	479
15:07:06	960.50	239
15:07:06	960.50	722
15:07:06	960.50	801
15:08:27	960.20	127
15:08:27	960.20	801
15:08:29	960.20	200
15:09:23	960.20	200
15:09:23	960.20	200
15:09:33	960.20	74
15:09:35	960.20	203
15:10:18	960.00	200
15:10:19	960.00	604
15:10:57	960.20	191
15:10:57	960.20	804
15:11:34	959.70	366
15:11:34	959.70	435
15:13:23	960.10	806
15:13:39	960.10	225
15:13:39	960.10	806
15:13:46	959.70	660
15:14:37	959.90	251
15:14:37	959.90	550
15:14:37	959.90	906
15:16:12	959.80	188
15:16:12	959.80	219
15:16:12	959.80	306
15:16:12	959.80	496
15:16:12	959.80	583
15:18:36	960.50	79
15:18:36	960.50	256
15:18:36	960.50	728
15:18:36	960.50	801
15:18:36	960.50	807
15:18:37	960.50	1
15:18:37	960.50	180
15:18:37	960.50	222
15:18:37	960.50	545
15:20:04	960.20	34
15:20:04	960.20	113
15:20:04	960.20	185
15:20:04	960.20	583
15:20:04	960.20	768
15:21:24	960.10	241
15:21:24	960.10	802
15:21:24	960.10	802
15:23:35	959.80	29
15:23:35	959.80	29
15:23:35	959.80	417
15:23:35	959.80	777
15:23:40	959.80	298
15:24:12	959.80	450
15:24:12	959.80	804
15:26:07	960.30	3
15:26:07	960.30	200
15:26:40	960.40	303
15:26:40	960.40	363
15:26:40	960.40	504
15:26:48	960.40	443
15:27:01	960.50	357
15:27:03	960.50	100
15:27:15	960.50	346
15:28:04	960.60	202
15:28:04	960.60	500
15:28:04	960.60	804
15:29:23	960.50	150
15:29:23	960.50	626
15:29:23	960.50	803
15:29:25	960.40	528
15:30:44	960.60	373
15:31:08	960.60	430
15:31:35	960.70	760
15:31:35	960.70	805
15:32:10	960.60	147
15:32:10	960.60	300
15:32:10	960.60	503
15:34:00	959.90	313
15:34:10	959.90	49
15:34:10	959.90	163
15:34:10	959.90	491
15:34:10	959.90	654
15:34:10	959.90	804
15:34:10	959.90	804
15:35:24	959.40	800
15:35:24	959.40	800
15:35:27	959.40	153
15:38:14	960.00	386
15:38:14	960.00	420
15:38:14	960.00	803
15:38:19	960.00	710
15:38:19	960.00	719
15:39:48	960.00	803
15:39:50	960.00	381
15:40:09	960.00	100
15:40:17	960.00	58
15:40:17	960.00	69
15:40:17	960.00	197
15:40:17	960.00	322
15:40:17	960.00	803
15:40:17	960.00	803
15:43:04	959.90	430
15:43:39	960.10	175
15:43:39	960.10	435
15:43:39	960.10	803
15:44:53	960.00	196
15:44:53	960.00	202
15:44:53	960.00	606
15:44:53	960.00	802
15:44:57	959.90	100
15:45:00	959.90	175
15:45:00	959.90	706
15:45:02	959.90	464
15:45:06	959.90	51
15:45:56	959.70	163
15:45:58	959.70	638
15:46:03	959.70	284
15:46:03	959.70	460
15:47:01	959.50	314
15:47:01	959.50	587
15:47:01	959.50	803
15:48:03	959.70	213
15:48:03	959.70	802
15:48:03	959.70	802
15:50:01	959.10	178
15:50:01	959.10	804
15:50:01	959.10	804
15:51:27	959.20	82
15:51:27	959.20	320
15:51:27	959.20	483
15:51:27	959.20	803
15:53:48	959.20	806
15:53:58	959.20	370
15:54:00	959.20	215
15:54:00	959.20	223
15:54:00	959.20	434
15:54:00	959.20	522
15:54:00	959.20	571
15:55:04	959.50	800
15:55:47	959.70	501
15:55:57	959.70	118
15:55:57	959.70	299
15:55:57	959.70	320
15:55:57	959.70	800
15:56:06	959.70	137
15:56:23	959.70	58
15:57:13	959.70	285
15:57:32	959.70	224
15:57:32	959.70	800
15:57:41	959.70	94
15:57:42	959.70	706
15:58:17	959.70	157
15:58:43	959.70	277
15:58:43	959.70	417
15:58:43	959.70	806
15:59:26	959.70	203
15:59:26	959.70	600
15:59:39	959.70	57
15:59:39	959.70	509
15:59:47	959.70	56
15:59:56	959.70	63
15:59:56	959.70	181
16:01:25	960.00	13
16:01:25	960.00	13
16:01:25	960.00	22
16:01:25	960.00	81
16:01:25	960.00	244
16:01:25	960.00	288
16:01:25	960.00	512
16:01:25	960.00	543
16:01:31	959.80	180
16:01:36	959.80	53
16:01:36	959.80	220
16:01:36	959.80	621
16:01:36	959.80	801
16:03:07	959.80	60
16:03:07	959.90	100
16:03:07	959.90	118
16:03:07	959.90	161
16:03:07	959.80	287
16:03:07	959.80	460
16:03:07	959.90	469
16:03:07	959.90	589
16:03:07	959.80	807
16:03:08	959.80	204
16:04:15	960.20	26
16:04:15	960.20	804
16:04:15	960.20	804
16:05:13	960.00	804
16:05:16	960.00	804
16:05:20	960.00	148
16:05:59	959.90	800
16:06:02	959.90	785
16:06:56	959.60	146
16:07:45	959.60	655
16:07:46	959.60	775
16:07:48	959.60	802
16:07:48	959.60	899
16:08:50	959.40	685
16:08:50	959.40	801
16:09:41	959.50	800
16:09:49	959.50	476
16:10:37	959.50	97
16:10:37	959.50	324
16:10:59	959.50	187
16:10:59	959.50	707
16:11:09	959.50	804
16:11:45	959.50	63
16:12:20	959.60	600
16:12:20	959.60	804
16:12:54	959.60	43
16:12:54	959.60	310
16:12:54	959.60	622
16:12:54	959.60	804
16:14:00	959.60	130
16:14:00	959.60	525
16:14:00	959.60	807
16:14:12	959.40	83
16:14:12	959.40	102
16:14:12	959.40	102
16:14:12	959.40	621
16:14:18	959.40	188
16:14:18	959.40	386
16:16:04	960.00	187
16:16:04	960.00	615
16:16:04	960.00	775
16:16:16	959.70	801
16:16:16	959.70	805
16:16:16	959.70	940
16:16:16	959.70	1032
16:17:59	960.00	37
16:17:59	960.00	297
16:17:59	960.00	508
16:17:59	960.00	955
16:18:06	959.80	802
16:18:06	959.80	850
16:19:52	959.70	159
16:19:52	959.70	642
16:19:52	959.70	806
16:20:02	959.70	1
16:20:04	959.70	114
16:20:04	959.70	203
16:20:04	959.70	638
16:20:04	959.70	802
16:20:04	959.70	802
16:20:04	959.70	802
16:21:07	959.60	769
16:21:07	959.60	806
16:21:33	959.60	801
16:21:33	959.60	801
16:21:37	959.60	183
16:22:07	959.50	115
16:22:07	959.50	241
16:22:07	959.50	499
16:22:07	959.50	564
16:22:08	959.50	190
16:22:08	959.50	191
16:23:23	960.00	119
16:23:23	960.00	215
16:23:23	960.00	683
16:23:23	960.00	802
16:24:55	960.20	803
16:25:17	960.70	110
16:25:17	960.70	266
16:25:17	960.70	308
16:25:17	960.70	619
16:25:35	960.60	197
16:25:35	960.60	612
16:25:35	960.60	637
16:25:35	960.60	802
16:25:35	960.60	803
16:25:35	960.60	805
16:26:22	960.50	801
16:26:23	960.50	400
16:26:23	960.50	801
16:26:25	960.50	401
16:26:31	960.50	31
16:26:31	960.50	81
16:26:31	960.50	770
16:26:31	960.50	801
16:28:25	961.00	33
16:28:25	961.00	190
16:28:25	961.00	190
16:28:25	960.90	485
16:28:57	960.70	312
16:28:57	960.70	402
16:28:57	960.70	543
16:28:57	960.70	838
16:28:57	960.70	933
16:35:03	957.60	1141

This announcement will also be available on National Grid's website at http://investors.nationalgrid.com/rns.aspx.

Enquiries to:

C James, Company Secretarial Assistant, (0207 004 3116).

This information is provided by RNS

The company news service from the London Stock Exchange

END

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