To the Lloyds building, in the heart of the City, for an instructive afternoon on the very specific and surprisingly complex subject of roof damage due to hailstones and the legal & insurance ins & outs thereof, courtesy of Zelle Law, without doubt the pre-eminent practitioners in the field. According to Adam Smith in The Wealth of Nations, specialisation brings the 'greatest improvement in the productive powers of labour', in which case I imagine Zelle have this one pretty much sewn up.