UK shares slip further as Middle East tensions flare

(Reuters) - British shares slipped on Wednesday as tensions in the Middle East threatened to boil over after Iran retaliated by launching missile strikes at U.S. forces in Iraq, driving investors away from risky assets and into safe-haven holdings.The FTSE 100 fell 0.5%, down for the third straight session, following news that Iran had hit back in response to the killing of a top Iranian commander by the United States last week.The FTSE 250 tumbled nearly 1% as a steep fall in payment..