“Willie Dixon. Originally, I heard this song when Coco Taylor did it. I’m a big fan of that greasy Chicago shuffle. Plus, it’s just a good lyric – and that’s the hardest thing with a shuffle, to find a good lyric.

“I wanted to do a British version of it, as if I were one of the Bluesbreakers. ‘What would they have done with this song in 1967?’ – that’s what I asked myself. A lot of times, I have that kind of concept in my head: ‘What would Clapton have done?’ ‘What would John Mayall and Peter Green have done?’

“There’s a company called Lazy J, and they have these high-powered Tweed Twins. I used two of them and turned them both to 10. Well, they go to 12, but I turned them up to where the distortion felt right. They’re awesome amps, truly great.”