Leucistic Rock Pigeon? It seemed have reddish eyes though, but I didn't get a good enough look to be sure.
Sorry these aren't great photos--It seemed distinctive enough to ID from this, but if it's unidentifiable my sister has a better one I could upload later
This cutie appeared to be either nesting or resting in the Oxford clock tower.
I have seen quite a few of these white clustered flowers in open grassy areas and beside paths here in Oxfordshire.
By Oxford Sports on the verge
Hopeless picture, but unmistakable visitor
Collared doves feeding on ground peanuts
Escaped from a nearby garden.