Tues­day night was almost rain free – that’s say­ing some­thing for this washout of an Eng­lish sum­mer which has so far plunged fes­ti­vals and out­door events into a mael­strom of mud and near bank­rupt­cy. So it was a pleas­ant expe­ri­ence to sit on dry paving stones in the court­yard of Som­er­set House, drink­ing a ubiquitous…