By Bethany Wales The ownership of one of Britain’s best known supermarkets has been thrust back into the spotlight in recent days after the news that Asda will become majority owned by a private equity giant later this year. Supermarkets form an integral part of the UK economy, employing hundreds of thousands of people and contributing millions in tax to the public purse. But who actually owns your favourite supermarket and who sits at the top pulling the strings? Who owns Tesco?Founded by East End market stall holder Jack Cohen, Tesco has been a publicly listed company since 1947 and is a mem…