(For a Reuters live blog on U.S., UK and European stock markets, click LIVE/ or type LIVE/ in a news window) * FTSE 100 up 0.4%, FTSE 250 adds 0.4% Sept 16 (Reuters) - UK shares edged higher on Thursday, lifted by industrials and financial stocks, while Ashtead Group jumped to the top of FTSE 100 index following a strong earnings update.