A Rare Rainbow,Colmer's Hill, Dorset Occurrence

Living where I do, with this view of Colmer's hill, I often capture rainbows, or parts of them at least. A full blown one like this is such a rare happening, it is like a prayer answered to me!
I managed to get a few shots of the storm clouds building up and withering away, then suddenly this was there, just for me! I doubt if many saw it, which is why I take pictures, to show people what they miss, hehe