Watching Trevor Nunn's funny and fleet-of-foot production of Love in Idleness, a "new" play forged by combining two drafts of an old play written by Terrence Rattigan that's been barely performed, is like a blast from the past.
Until the emergence of angry, radical drama in the 1960s every theatre in the West End would offer variations on its formula - posh people chattering away in posh drawing rooms, with a quick dip into melodramatic peril before leisured wit and privileged are restored. The overarching philosophy of most of this repertoire is summed up when a character quips that there's nothing that can't be overcome with "small talk".