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* FTSE 100 down 0.3%, FTSE 250 up 0.2%
* Rolls-Royce falls on repair delay
* Dollar earners weigh
Sept 20 (Reuters) - Britain's top share index edged lower onFriday as exporter stocks weakened on the back of a firmersterling, driven by rising hopes of a Brexit deal, andRolls-Royce tumbled after longer-than-expected repairs of itsTrent 1000 engines.
The FTSE 100 slipped 0.3% by 0715 GMT, while thedomestically-focussed FTSE 250 index inched 0.2% higher.
Hopes of a Brexit deal after European Commission PresidentJean-Claude Juncker said on Thursday that one was possible,helped the pound extend overnight gains against the dollar to atwo-month high.
Dollar-earners such as Unilever and HSBCweighed on the main index.
Rolls-Royce lost 3.3% after the engine-maker said itexpects problems with its Trent 1000 engines to take longer tofix.(Reporting by Yadarisa Shabong in BengaluruEditing by Andrew Heavens)