** Shares of oil and gas firm Tullow Oil TLW.L up 11.8% at 5.48p; top performer across London stocks
** Co announces board reset, appoints independent non-executive director Roald Goethe as chair
** Adds immediate departure of three independent non-executive directors, shrinking size of board to four members
** The West Africa-focused oil producer says significant reduction in board will result in further reduction of Tullow's cost base
** Including session's move, stock down ~74.16% YTD
(Reporting by Ankita Bora in Bengaluru)
((Ankita.Bora@thomsonreuters.com))