During this cold weather there is a chance that your boiler could freeze!
This doesn’t happen to every boiler unless you have a condensing boiler fitted and the condensation pipe is terminated outside.
If your boiler condense pipe freezes your boiler will run for a short period of time until it starts to either gurgle or leak from inside the case. If this happpens there is something you can do about it!
Identify that your condense pipe does take route externally. Remove any insulation fitted and boil the kettle..
It maybe neccassary to have a cuppa while doing this but save some water to pour out onto the external pipework. If you repeat the process until the pipe has thawed eventually the boiler will start operate normally. Hopefully in times of busy demand this will keep you going without waiting for a plumber to get to you.