The five leading designs for an Angel of the South have been revealed. The winner will be built in Ebbsfleet, Kent in 2010, as the South's answer to Antony Gormley's Angel of the North. Top left: Turner Prize winner Richard Deacon offers a skeletal tower of polyhedra. Predicted tabloid nickname: the wilting pylon. Top right: a giant horse, echoing the ancient tradition of chalk horses in Kent, by Mark Wallinger, the chap who assembled......