The parrots are Ring-Necked Parakeets (or Rose-Ringed Parakeet) and I reckon Andy has put them in here to try to get rid of them.
Whenever they newly appear in people's gardens (or nearby), folk say, "Ah, how lovely, what pretty birds". A month later, the same people say, "Aaaarghhh, what noisy birds, don't they ever shut up?"
They are a pleasing sight (or infestation, to some) moving slowly north and west out of the SE of England.
