As part of the BBC's Domesday Reloaded, five Radio 4 presenters return to their 'square' - the 3x4 kilometre piece of Britain that had special significance for them in 1986 - . What's changed? What's the same? And what do their discoveries tell us about how society's moved on? We hear from Mark Lawson, Sheila Dillon, Paddy O'Connell, Richard Coles and Jane Garvey.