I saw a pair in the local park today - a type I'd not seen before. This is in an urban/coastal area.
They were similar in size to a blackbird or magpie. Colour-wise a kind of buff with wings that had black and a very bright blue band on them...it was the blue that caught my eye. The head was slightly flat-ish on top.
I've looked on the RSPB site....but saw nothing similar.