Aah, I thought I'd read the MIs properly when I serviced them. Thanks, D_Hailsham, I thought I was going to appear on Rogue Traders! Just goes to show, it is a mistake believing things people post as fact on here.
Regarding the PatsMotors post, I too think the Remeha is vastly overrated.
They are a cheap boiler made cheaply, we have had a number of problems with our installed base, and stopped fitting them after 6 months. Some on here talked about them as the 'second coming' - in similar terms to the way the Atmos/Intergas lump is currently revered on this forum.
There are plenty of good boiler makes out there, for small domestic I'm sticking with Bosch, Viessmann and Vaillant.
NB: The Remeha manual is just superb. There are just 4 buttons on the front of the boiler - the manual describes 5. No-one proof read the thing, that should tell you all you need to know.