Gas fire soot build up

OrbitHeadache

The third tile has turned black and it burns when the heater is in ( yes I know it's dangerous so have kept it off now)

I think the issue was the ignition would not come on without a match so I lifted the third tile to use the match but I must not have  put it back properly hence why the tile has burned.

Any recommendations for someone in Nottingham who can service and fix these issues please?

Eldi_Dos

If you look up the gas safe register that will give you a list of qualified engineers in your area, who will service and if necessary carry out any repairs.
Do you have a CO monitor in that room?,  if not worth getting one.

twopenny

Yes to the gas safe register.
I had a bloke recommended and he was on it then off it. Nice bloke, didn't know enough.

I've run 2 gas fires for decades ago not seen that so definitely go for a professional. You sometimes see their vans around and you can ask for their card.
Mind you may have to try a few or wait ages for what they see as a small job but I've twice been fitted in when they've had a cancellation or a hold up on bigger jobs.