Oven working fine now, Charleygirl!
No idea what the bill will be, the same local independent firm came to fix the washing machine a few weeks back and I'm still waiting for the invoice for that!
They have a good reputation, have been trading for years, and also sell new and second hand appliances.
What I like about them is that they do try to fix things, rather than do the intake of breath, tell you the appliance has done well, but isn't it time you thought about a new one?
Actually, I'm slightly disappointed, I never did like the oven and had been having a look on line at new ones, but as the one I had earmarked was £250 (not expensive by todays standards) I'm pretty sure that mending was the better option financially!