There was a good double rainbow visible and with the ends clearly touching the ground, I thought that they seemed a long way apart.
I had a go at measuring the angular separation using the fingers method and managed to get my whole hand in. My little finger at arm's length is worth 1 degree. I'd estimate 6 degrees here. https://www.metoffice.gov.uk/weather/learn-about/weather/optical-effects/rainbows/double-rainbows suggests about 10 degrees so it really is quite a big separation.
