Thanks Dave?
My BG WR1 packed up with no lights showing and obviously no heating available.
Discovered Dave on E bay and following his very detailed instructions removed the WR1 and posted it to him for repair while at the same time adjusting the connections on the backplate under Dave's guidance as a temp fix for the heating.
Got the repaired WR1 back today and it is now reinstalled and system working perfectly - what can I say; one of nature's gentlemen!
Many thanks Dave.
Robert MacLean, October 2018