Thanks Bill, very informative, thats exactly how i feel but trying to get him to understand is the hard part, i have explained to him originally what you have stated in your post, but his answer always has been that the wiring for the heating is electric so is covered by the cert, even though i have told him that my remit finishes at the fcu at the boiler. I think i will have to see where it goes and do all the above, once again many thanks to everyone and all your comments. Could anyone point me in the right direction for more up to date T&C's.