There are UKAS companies where I can take it. It isn't easy getting there but I am making arrangements.
I took it to the UKAS company where I had made the arrangements and they did it the same day.
It was fixed around the 22mm copper pipe and had a slot very much like the grey ones now. It was totally encased in a tight linen bag. It was not broken or disintegrated in any way. It was held on with straps.
JamesEB