Ex-Newcastle United owner Mike Ashley was forced to hand over a colossal amount of his earnings in tax amid his potential takeover of Sheffield Wednesday . The billionaire businessman, 61, made his fortune through his creation of the Sports Direct brand before purchasing the Magpies in 2007. Ashley's net worth sits at £3.12billion, as per last year's The Sunday Times Rich List . His retail conglomerate calculates that it has paid more than £1bn of corporation tax since 2007, but his HMRC bill