"Incredibly rare"

A blatant back-blip, but I took a lot of photos of what appeared to be a strange double rainbow near Fort William on Wednesday. I read in today's paper that meteorologists have been surprised to see the rainbow here with an "incredibly rare" third rainbow inside the main bow. Sorry I didn't get a clear photo of it!
(I spent the day on a train home from Inverness and walking through Kendal in the rain and drizzle.)