Tariff pause by Washington buoys FTSE 100, insurer Admiral jumps

(Reuters) - UK shares gained for a second straight session on Wednesday over hopes of an improvement in global trade relations after Washington delayed imposing tariffs on some Chinese goods, while insurer Admiral rose after reporting a market-beating profit.The FTSE 100 index added 0.2% and the FTSE 250 midcap index rose 0.1% by 0707 GMT.Admiral jumped 6% to the top of the main bourse after the company posted a bigger-than-expected rise in earnings, driven by more customers in its UK..