OK thanks for all your replies. Before trying what I proposed and after doing a bit of further research I balanced all the radiators and turned the pump down slightly on the UFH. I'm delighted to say it worked a treat! Once again thanks for all your replies.
Hello all, first post so take it easy on me!
Diagram attached to hopefully explain it easily. We have recently had 2 storey extension built onto existing bungalow. Bungalow houses boiler and existing rads etc. radiator circuit has been extended into new part and on the ground floor a QPL...