FTSE 100 loses ground as exporters slip, Rolls-Royce tumbles

(Reuters) - Britain's top share index edged lower on Friday as exporter stocks weakened on the back of gains in sterling driven by rising hopes of a Brexit deal, while Rolls-Royce tumbled after delays to repairs of its Trent 1000 engines. The FTSE 100 was down 0.3% by 0815 GMT, while the domestically focused FTSE 250 index was 0.4% higher as it tracked gains in the local currency.Hopes Britain could yet strike a deal to exit the European Union after European Commission President Jean-Claude..