Hey Guys been away a while. Had some other stuff to deal with.
A boiler change should take at max a day if in the same location ie combi for combi or system for system. We fit commercial systems in 2 days with only 2 guys on the job.
Daryl, I've dropped you my email address
You can get a sabre boiler which is infact a vokera combi for cheap. All spare parts come from vokera.
I need more info as I think there is easier/cheaper permanent and temp solutions.
Cheers
Ps don't use a plumber, use a heating technician there's a difference, without being condescending.