‘Is democracy working? It didn’t work if you were a family living on the 20th floor of Grenfell Tower. Those families, those individuals, 79 so far and there will be more, were murdered by political decisions taken over recent decades”.

You know those police dramas, where the detective stares at a clue for ages before suddenly realising he was looking in the wrong place and missing the real story? I experienced just such a moment while pondering those remarks by John McDonnell at Glastonbury.

Jeremy Corbyn and his mentor Tony Benn at a TUC rally in 2003 BEN GURR FOR THE TIMES

At first, like everyone else, I thought the most important part of his statement came at the end, with his use of the term “murder”. And then it came to me. The most important part of what he said was at