Hope I'm not breaking any rules by posting this today, but the strange sunset materialised at 9.30pm last evening after I had posted my blip for yesterday.   I've not seen anything like it before so had to record it if only for my own records.
The tall bottom left is the sunset which doesn't really do it justice as I only had a small area between neighbours trees to capture it, the rest are of a rainbow happening at the same time.   I haven't seen one appearing when it is almost dark before.   The colours lasted for some time and were much richer and intense then I have been able to record on camera.