UK's Evoke gains on upbeat Q2
** Evoke EVOK.L gains 6.5% to 65.5p ** British betting firm's Q2 revenue up 5% y/y ** Sees HY core profits between 163 mln-167 mln pounds ($219.6 mln-$225 mln), up 43% y/y at mid-point ** Reaffirms FY revenue, profit guidance ** Jefferies, Peel Hunt expect profit to beat their estimates ** YTD, EVOK rises ~7% ($1 = 0.7423 pounds) (Reporting by Yamini Kalia in Bengaluru) ((Yamini.Kalia@thomsonreuters.com))