28th Aug 2008 11:51
| 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 | 
| Name of EPT | Merrill Lynch International | 
| Date of disclosure | 28 August 2008 | 
| Date of dealing | 27 August 2008 | 
| Telephone number | 020 7996 2121 | 
| Please see attached disclosure of dealings under Rule 38.5 in the securities of the following | 
| 27 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 | 27/08/2008 | 
| 2. DEALINGS | 
| (a) Purchases and sales | 
| Total number of securities | Highest price paid | Lowest price paid | 
| purchased | 
| 285,830 | GBP 52.43 | GBP 51.10 | 
| Total number of securities sold | Highest price received | Lowest price received | 
| 228,236 | GBP 52.45 | GBP 51.13 | 
| (b) Derivatives transactions (other than options) | 
| Product name, | Short/Long | Number of securities | Price per unit | 
| eg. CFD | 
| Long Swap | LONG | 2,318 | GBP 52.48 | 
| Long Swap | LONG | 3,250 | GBP 51.71 | 
| Long Swap | LONG | 5,682 | GBP 52.48 | 
| Long Swap | LONG | 6,107 | GBP 51.96 | 
| Long Swap | LONG | 12,950 | GBP 52.44 | 
| Long Swap | LONG | 1,550 | GBP 51.71 | 
| Product name, | Short/Long | Number of securities | Price per unit | 
| eg. CFD | 
| Short Swap | SHORT | 2,318 | GBP 52.21 | 
| Short Swap | SHORT | 10,000 | GBP 51.78 | 
| Short Swap | SHORT | 2,573 | GBP 51.66 | 
| Short Swap | SHORT | 48 | GBP 52.09 | 
| Short Swap | SHORT | 1,854 | GBP 51.66 | 
| Short Swap | SHORT | 1,550 | GBP 52.40 | 
| Short Swap | SHORT | 1,326 | GBP 51.66 | 
| Short Swap | SHORT | 571 | GBP 52.24 | 
| Short Swap | SHORT | 490 | GBP 52.21 | 
| Short Swap | SHORT | 432 | GBP 52.11 | 
| Short Swap | SHORT | 3,250 | GBP 52.40 | 
| (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 | Buying | 1,000 | £1.65 | AMERICAN | 17-Apr-09 | 
| (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 | 28/08/2008 | 
| 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 | 27/08/2008 | 
| 2. DEALINGS | 
| (a) Purchases and sales | 
| Total number of securities | Highest price paid | Lowest price paid | 
| purchased | 
| 640,818 | EUR 11.45 | EUR 11.20 | 
| Total number of securities sold | Highest price received | Lowest price received | 
| 432,669 | EUR 11.44 | EUR 11.21 | 
| (b) Derivatives transactions (other than options) | 
| Product name, | Short/Long | Number of securities | Price per unit | 
| eg. CFD | 
| Long Swap | LONG | 34,790 | EUR 11.33 | 
| Long Swap | LONG | 13,306 | EUR 11.31 | 
| Long Swap | LONG | 6,782 | EUR 11.31 | 
| Long Swap | LONG | 1,512 | EUR 11.31 | 
| Product name, | Short/Long | Number of securities | Price per unit | 
| eg. CFD | 
| Short Swap | SHORT | 21,689 | GBP 9.02 | 
| Short Swap | SHORT | 3,974 | EUR 11.41 | 
| Short Swap | SHORT | 20,943 | EUR 11.35 | 
| Short Swap | SHORT | 23,420 | EUR 11.41 | 
| Short Swap | SHORT | 28,206 | EUR 11.41 | 
| Short Swap | SHORT | 40,398 | EUR 11.26 | 
| (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 | 28/08/2008 | 
| 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 | 27/08/2008 | 
| 2. DEALINGS | 
| (a) Purchases and sales | 
| Total number of securities | Highest price paid | Lowest price paid | 
| purchased | 
| 105,767 | GBP 12.13 | GBP 11.90 | 
| Total number of securities sold | Highest price received | Lowest price received | 
| 195,536 | GBP 12.26 | GBP 11.96 | 
| (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 | 28/08/2008 | 
| 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 | 27/08/2008 | 
| 2. DEALINGS | 
| (a) Purchases and sales | 
| Total number of securities | Highest price paid | Lowest price paid | 
| purchased | 
| 590,377 | GBP 3.21 | GBP 3.15 | 
| Total number of securities sold | Highest price received | Lowest price received | 
| 459,176 | GBP 3.21 | GBP 3.14 | 
| (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 | 28/08/2008 | 
| Contact name | Louise Howard | 
| Telephone number | +44 20 7996 2121 | 
| Name of offeree/offeror with whom connected | EDS S.A. | 
| Nature of connection # | Advisor | 
Related Shares:
Banco SantanderCentricaRio Tinto