** Shares of British meal delivery firm Deliveroo ROO.L up 2%, hitting an over 3-year high of 175.6 pence
** Under deal, Doordash will buyout ROO for 180 pence per share or a total value of 2.9 billion pounds ($3.86 billion)
** DoorDash says financial terms of the deal are final but reserved the right to increase the offer if a third party made a competing offer
** ROO's Independent Committee decided to recommend offer to shareholders
** Up to Friday's close, the stock had risen 21.3% so far this year
($1 = 0.7519 pounds)
(Reporting by Raechel Thankam Job in Bengaluru)
((RaechelThankam.Job@thomsonreuters.com))