Octopus Energy was only set up in 2015 but has shaken up the energy market. Its website boasts of being the UK's "most awarded energy supplier" and promises cheap, renewable energy for households.

"I put the steak in front of him. I pulled up a chair and I said to him: 'I'm going to watch you enjoy your meal and make sure that it is perfect, sir.' "Low and behold it was perfect the fourth ...