Tom Watson has had more reinventions than Kylie Minogue has had mid-performance outfit changes. His performances over the years have ranged from baronial backroom fixer loathed by Blairites to scourge of Fleet Street when he took on Rupert Murdoch. There was a brief counter-culture period when he went around wearing a beret, a foray into hunting down alleged paedophiles, and a mysterious vanishing act when he realised that Jeremy Corbyn’s fans were out to get him.

In the magazine this week, I look at where Watson’s latest incarnation is taking him: he’s the key figure in the latest attempt to save...