UK shares firm on trade-driven optimism

(Reuters) - London's FTSE 100 jumped over 1% on Friday and recouped almost all losses from the past two sessions, as investors turned cautiously optimistic about a Sino-U.S. trade deal on China's willingness to iron out a pact and as the pound dipped.The main index's surge was led by trade-sensitive scrips, including HSBC , oil stocks and miners , while the export-heavy FTSE 100's gains were also bolstered by a weaker pound after UK's PMI data was worse-than-expected.British business this month..