So in the end the council took care of it all. I did try a tradesmen for better kit but it wasn't happening. I was always under the illusion that like for like changes are permitted. New internal doors in place of old cardboard like doors.
My boiler now takes some time to reach temperature. An engineer came out and said it might be the fan on its way out or main board but both held it's own while testing. I guess I'm not going to know now until winter kicks in. Normally it would boost but that's not been happening recently.