Just a little update - we decided not to go for the underfloor heating in the end as we were pushed for the time in getting all the variations in on time so that we could be in for Christmas. We have instead gone for a mixture of 2 heat pumps in the family room and the formal lounge, and panel heaters in the bedrooms (the kids rooms are south facing so they will be chilly in the winter but - hopefully - cool in the Summer) -and the quote was well under what we were expecting.

Maggie x