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LONDON, June 24 (Reuters) - Britain's FTSE 100 index is seen opening flat on Wednesday, according to financial bookmakers. For more on the factors affecting European stocks, please click on
* The UK blue chip index closed up 0.1 percent in the previous session at 6,834.87 points, hitting a new 11-day high as it extended gains from Monday, when it posted its strongest session since May.
* Futures for the index were down 0.1 percent by 0645 GMT.
* BARCLAYS - A California water utility filed a class action lawsuit on Tuesday to recoup losses in the electric market that it blames on Barclays Bank, which the U.S. government fined $453 million in 2013 for manipulating electricity prices.
* ROYAL DUTCH SHELL - Green groups urged the U.S. Department of Interior on Tuesday to revoke the agency's conditional approval of Royal Dutch Shell's 2015 Arctic oil exploration plan, saying it runs counter to established protections for walruses.
* STAGECOACH - British transport operator Stagecoach reported a rise in full-year profit, with the firm saying it hoped to build on its performance, having already had a "satisfactory" start to 2015-16.
* ELEMENTIS - Specialty chemicals maker Elementis said it expected its earnings per share for the full year to miss market expectations, hurt by a significant reduction in oil projects in North America.
* Oil prices edged higher on hopes for stronger than expected U.S. crude demand, while doubts over the prospect of reaching an agreement next week on Iran's nuclear programme eased oversupply concerns.
* London copper edged down on a seasonal decline in demand and as traders took profits a day after the metal's biggest single-day surge in more than seven weeks on optimism over a potential deal on Greek debt.
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> Other business headlines Multimedia versions of Reuters Top News are now available for: * 3000 Xtra : visit topnews.session.rservices.com * BridgeStation: view story .134 For more information on Top News visit topnews.reuters.com (Reporting by Atul Prakash)