UK's Bodycote jumps after 30 mln pounds buyback announcement
** Shares of thermal processing services provider Bodycote BOY.L jump 12.3% to 643p ** Stock among top gainers on FTSE 250 index .FTMC ** Co announces additional 30 mln pounds ($40 mln) share buyback ** Says performance in line with expectations provided in May trading update, full-year outlook unchanged ** BOY down ~0.9% year-to-date, including session's gains ($1 = 0.7483 pounds) (Reporting by Judes Joseph in Bengaluru) ((judes.joseph@thomsonreuters.com;))