I only measured the pipes or radiators using an infared thermometer (with tape on the pipes).That could simply be down to a flow issue, where were you getting the temps from?
Anyway, point taken. Have the boiler serviced/checked if I want but don't expect that to fix the underlying flow problem. Currently waiting for my plumber to give me dates to work on it. I will report back when I know more.
Thanks again for all the comments.
