First we heard the Buzzards calling, but couldn’t see where they were. Then they came into view – first two of them circling, then we realised there was a third lighter coloured Buzzard with them.
Although Buzzards do have a lighter coloured variant, I’m going on the assumption that the lighter one might be a juvenile Buzzard, and this potentially was a ‘training flight’ for it to gradually learn how to hunt. Certainly the Peregrine Falcons teach their young, by eventually dropping their prey for the youngsters to catch in flight…. I would guess that a Buzzards would do much the same!