The plane went down over the southern Indian Ocean to the west of Australia A London-based hedge fund millionaire is helping to finance the “final” search for the missing Malaysia Airlines aircraft which disappeared nearly four years‎ ago, in a bid to solve one of modern aviation’s greatest mysteries. Sky News has learnt that Anthony Clake, an executive at Marshall Wace Asset Management, is the key figure behind Ocean Infinity, the subsea exploration company which won the contract to hunt for the whereabouts of Flight MH370. ‎Mr Clake, who ‎oversees billions of pounds of clients’ money at Marshall Wace, is understood to have invested in Ocean Infinity after being impressed by its advanced technology. The search…