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FTSE 100 slips on global nerves, pub chain Ei surges

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* FTSE 100 down 0.4%, FTSE 250 down 0.2%

* Ei Group up after buyout offer

* ASOS sinks after latest profit alert

July 18 (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 red as it shed 0.4% in early deals. The mid-cap FTSE 250 lost 0.2% by 0709 GMT.

Slug and Lettuce owner Stonegate Pub Company <IPO-SPC.L> agreed to buy Ei Group for 285 pence a share, a 38% premium to Wednesday's close that sent the mid-cap pub chain's stock to its highest in more than a decade.

AIM-listed online fashion retailer ASOS tanked almost 20%, as it blamed operational issues for its third profit warning in eight months. (Reporting by Shashwat Awasthi in Bengaluru; editing by Patrick Graham)