Boris does not depress your Boriswatch host. He of the estimable floppy-haired brow, the estimable wit, could never provoke even the faintest suicidal tendancies in yours truly. However, mindful of constituents and so forth, he has taken on the Vice-Chairmanship of a cross-party group on depression. “City living,” notes The Telegraph, “depresses one woman out of four”. Show them Boris and they’ll soon perk up.