We waited about a week for this appointment so not an emergency call out. He stood in my kitchen for five minutes, flicked a couple of switches on the cooker and said he couldn't fix it. End of. They said nothing to me at any point about a call out charge so now they say 55 pound covers their overheads and they always charge call out regardless of whether any work was actually done. Any advice for me? I think it's daylight robbery.