Just now the Telegraph’s Berkeley Hotel party to celebrate the launch of their new business section is breaking up. Proof that the Daily Labourgraph is no longer the preferred reading of the City comes in this vignette: Will Lewis announced a special guest and in walked Gordon Brown, in his speech of introduction Lewis troweled it on thick how Gordon had saved the banking system to guests including City commissar Paul Myners and Robert Peston. Some of the more traditional Telegraph reading City types were less enamoured…