In message , GB
writes

Just installing a Vaillant now - seems well made with very high quality
fittings and ready-made tails. Very helpful tech advice line. About 35% more
expensive than the equivalent Potterton. I am not clear how good the
Potterton is, so cannot compare.

Geoff

Currently, Potterton (or rather Baxi) are probably not the best boilers
around, to understate the point
--
geoff