BUZZ-William Hill: top FTSE 250 gainer after Numis upgrade
** Shares in William Hill rise 2.5 pct after Numis says the recent share price fall has created buying opportunity
** Stock top gainer on FTSE-250 Midcap Index and on the FTSE-350 Travel & Leisure Index
** The UK's largest bookmaker's shares have fallen 6 pct in last two months
** Broker sounds upbeat on the gambling company's earnings momentum and business mix for H1 next fiscal
** Raises rating on stock to "buy" from "hold"; ups target price to 480p from 400p (email@example.com)
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