FTSE 100 slips on global trade worries; pub chain Ei surges after deal

(Reuters) - Britain's FTSE 100 followed other major stock markets lower on Thursday as initial batches of corporate earnings jangled nerves over global growth, while losses for London's mid-cap index were capped by a buyout of pub operator Ei Group.All but one of the blue-chip index's sectors were in the red as it shed 0.4%. The mid-cap FTSE 250 lost 0.3% by 0800 GMT.Slug and Lettuce owner Stonegate Pub Company agreed to buy Ei Group for 285 pence a share, a 38% premium to Wednesday's close,..