Having issues with some of them not getting hot, or the thermostatic knobs don't work. Was Googling how to fix them and radiator bleeding came up. I'm aware it's a thing that you can do to fix the system, but I didn't realise it was a normal maintenance job that you're supposed to do every year.
According to this article www.shellenergy.co.uk/blog/post/how-to-bleed-your-radiators
you should do it regularly to keep them efficient. No wonder ours are useless!
So, is it just me? Are you all regularly bleeding radiators?