Alistair McIntosh, chief executive of the Housing Quality Network, on the worthy but muddled thinking of David Cameron's favourite think-tank. Will no one rid me of this turbulent Policy Exchange? All I needed at six in the morning was Alex Morton on the wireless. I rely on Radio Two to rouse me with pleasant tunes by the likes of Crosby, Stills and Nash. But there he was dynamiting council estates to make way for Nash terraces. Quick as a flash I got up to see if my council tenant neighbours were und...