1st Sep 2008 09:30
| FORM 38.5 (SUMMARY) | 
| Lodge with Company Announcements Office and the Panel. Use a separate form for each class of | 
| securities in which dealings have been made. | 
| CONNECTED EXEMPT PRINCIPLE TRADER: | 
| DISCLOSURE UNDER RULE 38.5 OF THE CITY CODE ON TAKEOVERS AND MERGERS | 
| Name of EPT | Merrill Lynch International | 
| Date of disclosure | 01 September 2008 | 
| Date of dealing | 29 August 2008 | 
| Telephone number | 020 7996 2121 | 
| Please see attached disclosure of dealings under Rule 38.5 in the securities of the following companies: | 
| 29 August 2008 | 
| Rio Tinto Plc - Common | 
| Imperial Energy Corporation Plc - Common | 
| CENTRICA PLC - Common | 
| Banco Santander SA. - Common | 
| FORM 38.5(a) | 
| DEALINGS BY CONNECTED EXEMPT PRINCIPAL TRADERS | 
| (Rule 38.5 of The City Code on Takeovers and Mergers) | 
| 1. KEY INFORMATION | 
| Name of exempt principal trader | Merrill Lynch International | 
| Company dealt in | Rio Tinto Plc | 
| Class of relevant security to which the | Common | 
| dealings being disclosed relate | 
| Date of dealing | 29/08/2008 | 
| 2. DEALINGS | 
| (a) Purchases and sales | 
| Total number of securities | Highest price paid | Lowest price paid | 
| purchased | 
| 295,936 | GBP 53.60 | GBP 52.02 | 
| Total number of securities sold | Highest price received | Lowest price received | 
| 237,448 | GBP 53.70 | GBP 52.01 | 
| (b) Derivatives transactions (other than options) | 
| Product name, | Short/Long | Number of securities | Price per unit | 
| eg. CFD | 
| Long Swap | LONG | 26,091 | GBP 52.29 | 
| Long Swap | LONG | 3,220 | GBP 52.29 | 
| Long Swap | LONG | 514 | GBP 52.17 | 
| Product name, | Short/Long | Number of securities | Price per unit | 
| eg. CFD | 
| Short Swap | SHORT | 4,332 | GBP 52.67 | 
| Short Swap | SHORT | 15,904 | GBP 52.67 | 
| (c) Options transactions in respect of existing securities | 
| (i) Writing, selling, purchasing or varying | 
| Product name | Writing, | Number of | Exercise | Type, e.g. | Expiry date | Option | 
| selling, | securities under | price | American, | money | 
| eg call option | purchasing, | option | European etc | paid/received | 
| varying etc. | per unit | 
| Warrant | Selling | -11,200 | £0.00 | AMERICAN | 17-Apr-09 | 
| Warrant | Buying | 11,200 | £0.00 | AMERICAN | 17-Apr-09 | 
| Warrant | Buying | 14,000 | £0.00 | AMERICAN | 19-Jun-09 | 
| Warrant | Buying | 29,500 | £0.00 | AMERICAN | 19-Jun-09 | 
| Warrant | Buying | 78,330 | £0.00 | AMERICAN | 17-Oct-08 | 
| Warrant | Buying | 2,000,000 | £0.00 | AMERICAN | 17-Apr-09 | 
| Warrant | Buying | 2,500,000 | £0.00 | AMERICAN | 17-Oct-08 | 
| Warrant | Buying | 13,000,000 | £0.00 | AMERICAN | 19-Jun-09 | 
| Warrant | Buying | 14,000,000 | £0.00 | AMERICAN | 16-Jan-09 | 
| Warrant | Buying | 11,000 | £0.00 | AMERICAN | 16-Jan-09 | 
| Warrant | Selling | -29,500 | £0.00 | AMERICAN | 19-Jun-09 | 
| Warrant | Selling | -1,000 | £0.00 | AMERICAN | 17-Oct-08 | 
| Warrant | Selling | -11,000 | £0.00 | AMERICAN | 16-Jan-09 | 
| Warrant | Selling | -2,000 | £0.00 | AMERICAN | 17-Apr-09 | 
| Warrant | Buying | 1,000 | £0.00 | AMERICAN | 17-Oct-08 | 
| Warrant | Buying | 3,500,000 | £0.00 | AMERICAN | 17-Apr-09 | 
| Warrant | Buying | 3,999,000 | £0.00 | AMERICAN | 17-Oct-08 | 
| Warrant | Buying | 9,000,000 | £0.00 | AMERICAN | 18-Sep-09 | 
| Warrant | Selling | -42,050 | £0.00 | AMERICAN | 18-Sep-09 | 
| Warrant | Selling | -10,000 | £0.00 | AMERICAN | 18-Sep-09 | 
| Warrant | Selling | -78,330 | £0.00 | AMERICAN | 17-Oct-08 | 
| (ii) Exercising | 
| Product name | Number of securities under | Exercise price | 
| eg call option | option | 
| 3. OTHER INFORMATION | 
| Agreements, arrangements or understandings relating to options or derivatives | 
| Full details of any agreement, arrangement or understanding between the person disclosing and any | 
| other person relating to the voting rights of any relevant securities under any option referred to on this | 
| form or relating to the voting rights or future acquisition or disposal of any relevant securities to which | 
| any derivative referred to on this form is referenced. If none, this should be stated. | 
| NONE | 
| Date of disclosure | 01/09/2008 | 
| Contact name | Louise Howard | 
| Telephone number | +44 20 7996 2121 | 
| Name of offeree/offeror with whom connected | BHP Billiton Plc | 
| Nature of connection # | Advisor | 
| FORM 38.5 | 
| DEALINGS BY CONNECTED EXEMPT PRINCIPAL TRADERS | 
| (Rule 38.5 of The City Code on Takeovers and Mergers) | 
| 1. KEY INFORMATION | 
| Name of exempt principal trader | Merrill Lynch International | 
| Company dealt in | Banco Santander SA. | 
| Class of relevant security to which the | Common | 
| dealings being disclosed relate | 
| Date of dealing | 29/08/2008 | 
| 2. DEALINGS | 
| (a) Purchases and sales | 
| Total number of securities | Highest price paid | Lowest price paid | 
| purchased | 
| 1,291,813 | EUR 11.70 | EUR 11.57 | 
| Total number of securities sold | Highest price received | Lowest price received | 
| 1,046,729 | EUR 11.70 | EUR 11.57 | 
| (b) Derivatives transactions (other than options) | 
| Product name, | Short/Long | Number of securities | Price per unit | 
| eg. CFD | 
| Long Swap | LONG | 11,620 | EUR 11.63 | 
| Long Swap | LONG | 5,785 | EUR 11.60 | 
| Product name, | Short/Long | Number of securities | Price per unit | 
| eg. CFD | 
| Short Swap | SHORT | 6,539 | EUR 11.60 | 
| Short Swap | SHORT | 10,350 | EUR 11.63 | 
| (c) Options transactions in respect of existing securities | 
| Product name | Writing, | Number of | Exercise | Type, e.g. | Expiry | Option | 
| selling, | securities under | price | American, | date | money | 
| eg call option | purchasing, | option | European etc | paid/received | 
| varying etc. | per unit | 
| (ii) Exercising | 
| Product name | Number of securities under | Exercise price | 
| eg call option | option | 
| 3. OTHER INFORMATION | 
| Agreements, arrangements or understandings relating to options or derivatives | 
| Full details of any agreement, arrangement or understanding between the person disclosing and any | 
| other person relating to the voting rights of any relevant securities under any option referred to on this | 
| form or relating to the voting rights or future acquisition or disposal of any relevant securities to which | 
| any derivative referred to on this form is referenced. If none, this should be stated. | 
| NONE | 
| Date of disclosure | 01/09/2008 | 
| Contact name | Louise Howard | 
| Telephone number | +44 20 7996 2121 | 
| Name of offeree/offeror with whom connected | Banco Santander SA. | 
| Nature of connection # | Advisor | 
| FORM 38.5(a) | 
| DEALINGS BY CONNECTED EXEMPT PRINCIPAL TRADERS WITH | 
| RECOGNISED INTERMEDIARY STATUS DEALING IN CLIENT-SERVICING | 
| CAPACITY | 
| (Rule 38.5(a) of The City Code on Takeovers and Mergers) | 
| 1. KEY INFORMATION | 
| Name of exempt principal trader | Merrill Lynch International | 
| Company dealt in | Imperial Energy Corporation Plc | 
| Class of relevant security to which the | Common | 
| dealings being disclosed relate | 
| Date of dealing | 29/08/2008 | 
| 2. DEALINGS | 
| (a) Purchases and sales | 
| Total number of securities | Highest price paid | Lowest price paid | 
| purchased | 
| 250,587 | GBP 11.85 | GBP 11.69 | 
| Total number of securities sold | Highest price received | Lowest price received | 
| 210,504 | GBP 11.85 | GBP 11.70 | 
| (b) Derivatives transactions (other than options) | 
| Product name, | Short/Long | Number of securities | Price per unit | 
| eg. CFD | 
| (c) Options transactions in respect of existing securities | 
| Product name | Writing, | Number of | Exercise | Type, e.g. | Expiry | Option money | 
| selling, | securities under | price | American, | date | 
| eg call option | purchasing, | option | European etc | paid/received | 
| varying etc. | per unit | 
| (ii) Exercising | 
| Product name | Number of securities under | Exercise price | 
| eg call option | option | 
| 3. OTHER INFORMATION | 
| Agreements, arrangements or understandings relating to options or derivatives | 
| Full details of any agreement, arrangement or understanding between the person disclosing and any | 
| other person relating to the voting rights of any relevant securities under any option referred to on this | 
| form or relating to the voting rights or future acquisition or disposal of any relevant securities to which | 
| any derivative referred to on this form is referenced. If none, this should be stated. | 
| NONE | 
| Date of disclosure | 01/09/2008 | 
| Contact name | Louise Howard | 
| Telephone number | +44 20 7996 2121 | 
| Name of offeree/offeror with whom connected | Imperial Energy Corporation Plc | 
| Nature of connection # | Advisor | 
| FORM 38.5(a) | 
| DEALINGS BY CONNECTED EXEMPT PRINCIPAL TRADERS WITH | 
| RECOGNISED INTERMEDIARY STATUS DEALING IN CLIENT-SERVICING | 
| CAPACITY | 
| (Rule 38.5(a) of The City Code on Takeovers and Mergers) | 
| 1. KEY INFORMATION | 
| Name of exempt principal trader | Merrill Lynch International | 
| Company dealt in | CENTRICA PLC | 
| Class of relevant security to which the | Common | 
| dealings being disclosed relate | 
| Date of dealing | 29/08/2008 | 
| 2. DEALINGS | 
| (a) Purchases and sales | 
| Total number of securities | Highest price paid | Lowest price paid | 
| purchased | 
| 225,815 | GBP 3.28 | GBP 3.26 | 
| Total number of securities sold | Highest price received | Lowest price received | 
| 1,565,582 | GBP 3.30 | GBP 3.25 | 
| (b) Derivatives transactions (other than options) | 
| Product name, | Short/Long | Number of securities | Price per unit | 
| eg. CFD | 
| (c) Options transactions in respect of existing securities | 
| Product name | Writing, | Number of | Exercise | Type, e.g. | Expiry | Option money | 
| selling, | securities under | price | American, | date | 
| eg call option | purchasing, | option | European etc | paid/received | 
| varying etc. | per unit | 
| (ii) Exercising | 
| Product name | Number of securities under | Exercise price | 
| eg call option | option | 
| 3. OTHER INFORMATION | 
| Agreements, arrangements or understandings relating to options or derivatives | 
| Full details of any agreement, arrangement or understanding between the person disclosing and any | 
| other person relating to the voting rights of any relevant securities under any option referred to on this | 
| form or relating to the voting rights or future acquisition or disposal of any relevant securities to which | 
| any derivative referred to on this form is referenced. If none, this should be stated. | 
| NONE | 
| Date of disclosure | 01/09/2008 | 
| Contact name | Louise Howard | 
| Telephone number | +44 20 7996 2121 | 
| Name of offeree/offeror with whom connected | EDS S.A. | 
| Nature of connection # | Advisor | 
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