UPDATE 2-FTSE trips on ex-div trade, U.S.-China trade doubts

UPDATE 2-FTSE trips on ex-div trade, U.S.-China trade doubts

FTSE 100 down 0.2%, FTSE 250 up 0.3% * Stocks trading ex-dividend weigh on main index * Trade worries persist after Trump signs HK legislation * Virgin Money UK enjoys best day ever * Go-Ahead falls …