CraigB wrote:
My new house comes complete with a Baxi Barcelona CH boiler which
repeatedly locks out. following speaking to a plumber friend of mine
and reading up on numerous horror stories on the web, it seems that I
may be wise to replace the whole thing.



Does your plumber friend need to buy lots of christmas presents? ;-)

If you've got a pressurised HW system, that you plan to keep, then I
don't see why you're considering combi boilers.