There may be some basic democratic norm John McDonnell has failed to undermine, but if so I fear only by accident. This is, after all, a man who once lauded the “bombs and bullets” of the IRA and keeps a plaque in his  office honouring the convicted republican terrorists who died during the hunger strikes. Yet even by McDonnell’s subterranean standards his response to Boris Johnson’s accession to the premiership was extraordinary, and deeply troubling.

Just hours after Johnson became Prime Minister several thousand anti-Tory protestors