Ah, the RSPB. That explains a lot. Has I seen that at the outset my response would have been very different.
An admirable body, but a charitable conservation group, dependent, to a large extent, on public support, and on the lifeblood of publicity, for its very existence, and therefore with its own agenda. There are those, myself included, who believe they have lost sight of their core values, and will jump on any passing bandwagon in search of a bye-line, some with some very tenuous links to bird protection.
My own conclusions tend to be based on, apart from my own research, the research and learned papers of fellow members of the British Trust for Ornithology and and of members of the British Ornithologists Union, whose outlook tends to be more objective.
Back to the original point of the thread.
Interestingly enough, I was listening to a live report from the Cairngorm National Park this morning, still largely covered in snow, and the ranger commented that the Rooks were getting ready to breed, and that is unlikely to be because of unseasonal weather!