Manchester United's owners the Glazer family have seen their fortune further increase in the last year. The wealth of each of the six siblings - Avram, Joel, Edward, Darcie, Kevin and Bryan - has jumped a mammoth $300million (£223m) over the last year. They're now all valued at $2billion (£1.59bn), according to Forbes' new Billionaires List , placing them as the 2,052nd richest people in the world . The windfall comes at a time when the family's grip on United has been partially loosened, but