Unusual scenes in the Commons today. Normally, exchanges between Theresa May and Yvette Cooper are icy. Literally icy. The temperature in the chamber plummets 40 degrees. Backbenchers huddle for warmth inside hastily constructed igloos. Clerks in fur hats and gloves attempt desperately with pickaxes to free a junior minister encased in a block of ice. Eric Pickles, swaddled in seal skins on the front bench, snacks on the thigh of a polar bear.