Barratt has consolidated its position as Britain's biggest housebuilder according to Housebuilder magazine's 2011 Top 25 ranking published today. The table ranks housebuilders on turnover while also listing several other criteria including units built, profit and average selling price. The top six has remained steady this year - with Taylor Wimpey, Persimmon, Bellway, Berkeley and Galliford Try in the next …