UK's Ocean Wilson slips after agreeing to merge with Hansa Investment
** British investment holding company Ocean Wilsons Holdings OCN.L slips 10.6% to 1,305p; set for biggest one-day pct loss since August 2018 ** Stock among top losers across all London stocks ** Co and Hansa Investment HAN.L agree to all-share merger to create diversified investment firm with more than 900 million pounds ($1.21 billion) in net assets ** OCN sheds ~1% YTD ($1 = 0.7450 pounds) (Reporting by Nithyashree R B in Bengaluru) ((NithyashreeRB@thomsonreuters.com))