Theresa May is teetering. But her fall will not end the crisis | Matthew d’Ancona

Though the prime minister has been a profound disappointment, she is only the symptom of a deeper malaiseTheresa May’s expression is hard to read at the best of times, and almost impenetrable at the worst. So it proved on Sunday when she made her second appearance in less than a month on the BBC’s Andrew Marr Show. Was the embattled prime minister boldly channelling Marshal Ferdinand Foch during the first Battle of the Marne in 1914: Mon centre cède, ma droite recule, situatio