The quickness of the cursor on the submit button deceives the brain.

I was going to post - after Micca's list...

Everything you want to do, you have to do something else first

If you want the smell of gas in garage dealt with, it will have gone by the time the gas man cometh, but he will decide you can't use your heater because it doesn't have a suitable route for combustion air.

If what you want to do is get the gas-safe person fit a vent in a plywood panel around a door, it will turn out not to be plywood but glass plied with wallpaper, so you will need the glazier to come and fit the vent before the heater can be serviced.

My feet are cold.