EDINBURGH, July 31 (Reuters) - Britain's FTSE 100 index is seen opening up 4 to 7 points, or 0.1 percent higher on Thursday, according to financial bookmakers. For more on the factors affecting European stocks, please click on
* The FTSE 100 index ended 0.5 percent weaker at 6,773.44 points, hit by a weaker mining sector led down by Chilean firm Antofagasta.
* CENTRICA - The domestic energy supplier is in talks with the UK government over sanctions on Russia and the possible impact on its business, the Guardian reported.
* CO-OP GROUP - The restructuring of the Co-operative Group is poised to continue with the sale of its security arm in a deal that will raise money to help shore up its troubled finances, Sky reported.
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