BUZZ-William Hill: top FTSE 250 gainer after Numis upgrade
** Shares (Berlin: DI6.BE - news) in William Hill (Other OTC: WIMHF - news) 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 (aashika.jain@thomsonreuters.com)