There are a couple of Jay’s around and about where we are. My first though was young Magpie and then perhaps a young Jay.
All the Jay pics that I have seen show the young birds to have at least some sort of Jay type markings.
This bird that I have seen does not. Also its brown head and upper neck markings start abruptly, like it’s stuck its head in a tin of brown paint, if you get my drift.
The only bird I can think of that has the “head in a tin of brown paint” thing going on is the black headed gull. But that applies to its summer plumage only. In winter, the black head recedes to a small spots just behind the eyes.
Another possibility is the hooded crow but this is limited to Scotland, Ireland and parts of west Wales.
I’ve just scanned through a couple of hundred photos of British birds, and I can’t find anything at all that resembles that description, at that size. Plenty of small warbler size birds with light coloured bodies and dark heads, but no large birds. Possibly a non-native species blown in from elsewhere. Pity there’s no pic, even a small one.
But almost completely white on the body and completely brown on the head.
To answer some of the Q’s from above:
Where was it seem? on the ground, in a tree for example..
I’ve seen it on the ground, in a tree and in flight.
Did it have a long or short tail?
Short – so not an albino Magpie (unless it had lost it’s tail feathers.
And did it make a call or any sort?
Nope.
It’s likely to have a leucistic condition so it’s normal colourations aren’t present.
Also did it appear to be alone or where there other birds present?
Mostly seen on its own (in flight and in a tree) but when I saw it on the ground today it was hanging about with a Rook.
No luck with the RSPB bird identifier but the Bird ID picture of the Black Headed Gull is pretty close as far as the colouring is concerned. However, I know what a gull looks like and this mystery bird is definitely not a gull.
Thanks for heads up about the Albino Blackbird SA.