Ed Sheeran makes his manager carry a picture of 'Harry Potter's Weasley twins in his wallet

Speaking on the new BBC Introducing podcast, Stuart said: "The deal I get nervous with is my own management deal with Ed Sheeran because every year he puts a stupid clause in it that I have to proceed with. It’s the honest to God truth. I have to carry a picture of them in my wallet at all times. I have a little laminated card of those lovely twins. I have to have that with me at all times. It’s in my management contract.

"There’s a picture of the two twins from Harry Potter, behind me, that rises up from the wall. That’s a clause in my contract with him. Stupid things like that. Ed's actually misunderstood the contract. He thinks I have to show it to people everywhere I go. If I'm in [a magazine] and there isn’t a picture of it, he rings me and says, 'You're in breach [of the contract].'"

Ed and Stuart recently joined forces to open a pub, which is called Bertie Blossoms and is based in Notting Hill.

Speaking about the venture, he said: "We had some property that we were going to look into making into a restaurant a few years ago and we just decided we’d make it into a bar. For little else than the fact that we’d like to say we own a bar. I tried to go behind the bar and they said, 'You’re not allowed behind the bar.' I don’t know if I’m not allowed to serve or they didn’t want me there. Ed got behind the bar, he was serving drinks."