Looks like a juv Honey Buzzard to me. I wonder if the tail barring has been lost in lightening the picture. Bonelli's always strikes me as a giant goshawk with Eagle wings and I wouldnt expect it to be so dark. It looks too lanky for Common Buzzard,
I've just seen this. They used to breed in a palm by the football pitch near El Hondo at the beginning of the Vistabella Road as you head in from La Marina but its probably 8 years since I last saw them there so no idea if it is still a good location.
Pale phase Buzzards are really very common in the south west, especially immature birds and arent really noteworthy. I would be surprised if I didn't see one in the south west whereas here in Yorkshire they are unusual but regular. Two local ones at Wykeham Forest and Tophill Low are regularly...
Yes, I've seen a handful and found a territory in Central Scotland that was confirmed the following year. I suspect there are many more pairs but they are both secretive and their breeding season falls outside the normal raptor monitoring period for other Scottish raptors so they are overlooked.