Actually, you could be spot on with Boilermate IIs on this estate. I know the houses were built 1993 and our store was replaced in 2004 by BG (I think)
The rads were pathetically under sized in living room, so had to get bigger ones, then another in the loft conversion. Pure guess work, but i would say we have nearly doubled the volume of the rad circuit, based on panel size. I think the installers have over looked this point! I want to increase the size of one more rad, so this will only compound the issue.
Any suggestions of someone locally who can fix me up with a new boiler and what boiler would be required, I would like to keep the store.