FTSE 100 dips as Next, Diageo weigh, BoE statement awaited

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* FTSE 100 down 0.2%, FTSE 250 down 0.1%

* Next, Diageo fall after weak updates

* Traders await BoE policy statement

Sept 19 (Reuters) - London's FTSE 100 was led lower on Thursday by spirits-maker Diageo and clothing chain Next, while traders awaited the Bank of England's policy decision after its U.S. counterpart lowered interest rates but was guarded on future cuts.

The blue-chip bourse edged 0.2% lower by 0707 GMT - its fourth straight day in the red, while the more domestically-focused FTSE 250 index dipped 0.1% ahead of BoE's interest rate decision.

Next skidded 5% after it flagged that the first few weeks of the Autumn season were disappointing and Diageo slipped 1.4% after it said it was "not immune" to changes in global trade policies as it laid out targets for the year.

Midcap constituent IG Group jumped 6% as it said client numbers grew thanks to favorable market conditions in August, while small cap Kier Group lost 7% after the contractor posted an annual loss. (Reporting by Muvija M in Bengaluru; Editing by Angus MacSwan)