LONDON (Reuters) – British bookmaker William Hill said a poor retail performance in its third quarter supposed working revenue had fallen 20 million kilos ($32.5 million) beneath expectations, warning that shortfall might not be recovered via the year finish. Quiet trading in July helped push retail internet earnings within the 13 week duration to Oct 1 down 4 % on an underlying foundation, the agency mentioned on Thursday, with gross margin wins falling zero.8 percentage points as football outcomes went the way of consumers. …