Holding in Company

TR - 1: Notification of Major Interests in Shares

1

Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached:

Grafton Group plc

2

Reason for the notification (please place an X inside the appropriate box):

An acquisition or disposal of voting rights

x

An acquisition or disposal of financial instruments which may result in the acquisition of shares already issued to which voting rights are attached

An event changing the breakdown of voting rights

Other (please specify)

3

Full name of person(s) subject to notification obligation:

Investec Asset Management Limited

4

Full name of shareholders(s) (if different from 3):

N/A

5

Date of transaction (and date on which the threshold is crossed or reached if different):

15 September 2010

6

Date on which issuer notified:

16 September 2010

7

Threshold(s) that is/are crossed or reached:

5%

8

Notified Details:

A: Voting Rights attached to shares

Class/type of shares (if possible using ISIN CODE)

Situation previous to the Triggering transaction

Resulting situation after the triggering transaction

Number of shares

Number of Voting Rights

Number of shares

Number of Voting Rights

% of Voting Rights

Direct

Direct

Indirect

Direct

Indirect

IE00B00MZ448

11,509,414

11,509,414

0

11,609,414

5.02%

SUBTOTAL A (based on aggregate voting rights)

11,609,414

5.02%

B: Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument

Expiration date

Exercise/Conversion period

No. of voting rights that may be acquired (if the instrument exercised/converted)

% of voting rights

SUBTOTAL B (in relation to all expiration dates)

NIL

NIL

TOTAL (A + B) [where applicable in accordance with national law]

Number of voting rights

% of voting rights

11,609,414

5.02%

9

Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable: n/a

Proxy Voting

10

In case of proxy voting: n/a

11

Additional information