Red Kite - not quite Arne but not far away!

Just to let you know there  were several sighting of a red kite round the Kimmeridge / Creech area today
Im a warden at Kimmeridge Marine Centre for DWT, a visiter came in and reported it over the valley leading down to the bay, then I got a really good sighting of it from my car driving home over Creech Hill. I stopped to try and get a photo but it was too far away by then, a couple in the car park said they had been watching it for about 20 mins.
I know they're not a common sighting in Dorset, how often are they seen.