This year’s roles appealed because “they were totally different”. “Having played the same character for 10 years I jump at every opportunity I have to mix it up. Going away to do Harry Potter was a bit of a ballache,” he continues in his deadpan Yorkshire accent, before realising this could sound brattish. “Don’t get me wrong, I sound like a twat. It was such an opportunity and there’s me going ‘I want to go to the pub with my mates’. That feeling disappeared. I realised I was doing an incredible job.”

He’s in touch with the Harry Potter team, speaking to Robbie Coltrane on the phone and playing cricket with Tom Felton, who played Draco Malfoy. “I would never in a million years regret doing Harry Potter. I owe so many things in my life to it,” he says.

Ripper Street appealed because, Lewis says, “I have a morbid fascination with serial killers. This show is about dramatic human stories that happen to be set in Victorian England. The first episode deals heavily with imperialism, immigration, Islam, murder, police corruption and all these things we are still talking about today. Man’s inhumanity to man is an interesting topic.”

After that he had four months to get in shape — on a strict no carbs or alcohol diet — for Me Before You, which also stars Game of Thrones’ Emilia Clarke and Sam Clafin. He trained with Tim Buckley, who works with Daniel Craig on James Bond and is “simultaneously my hero and the worst person I’ve ever met in the entire world because he flogged the **** out of me”.

He did high-intensity weights, circuits and ate a high protein and fat diet. “The idea of training was more about form and thinking about muscle groups — but when you are on set with Emilia Clarke there’s little need for other motivation to get in shape.” He’s mostly stuck to Buckley’s regime, except he had a Dr Pepper today and spilt it on his white shirt.