Hi I have only lived in my house for a few weeks so I'm not used to the boiler. I bled the radiators today and the heating went off , I am sure the system needs topping up with water but I have know idea how to ,could anyone help ?

There should be a manual fill valve on your system. If not you might have a automatic fill valve and if that is the case the auto fill valve is not working.

Thanks a lot , I have no manual top up valve or a pilate light ignition :Z, but I managed to relight the boiler and thankfully the top up valve was still working so all is well for now :) thanks again !