FTSE erases last week's gain on rising Hong Kong tensions

(Reuters) - UK's main stock index fell sharply on Monday as a violent escalation in protests in Hong Kong knocked Asia-facing financial stocks, while investors waited for British economic growth numbers.The FTSE 100 slid 0.7% by 0806 GMT, handing back nearly all the gains accumulated last week, while the FTSE 250 index of more domestic-focussed firms lost 0.5%.Bluechips HSBC , Prudential and China-exposed miners all slipped roughly 2% after news that Hong Kong police shot and wounded one..