Bertie Carvel is unrecognisable from his last appearance at the Old Vic when he not only looked like Donald Trump in The 47th, he captured every nuance of speech, glance and gesture of the former president. He does, though, play a character with an equally monstrous ego, a man of utter self-absorption and fired with a passion for his own self-aggrandisement. This is a Henry Higgins with more than a touch of Aspergers – he's a tweedy version of Benedict Cumberbatch's Sherlock and his Watson is Michael Gould's charmingly avuncular Colonel Pickering. Shaw's 1913 play Pygmali...