Well got up this morning and nice and warm upstairs............................

And like being in a freezer downstairs! Turns out that when my buddy was fitting the new shower the father in law mentioned that there was a kink in one of the pipes going up through the ceiling from the furthest Rad which he thought was holding the system back. But I dont know...

Cant work out why 4 out of 5 rads have been working and now we're down to 3!!

But As long as upstairs is good, I think I need to adopt the premise that It AINT MY HOUSE so why am I worrying about it!