Mike Coon wrote:

CT wrote:

Pied Flycatcher?

I know sizes are tricky, but surely that is quite a bit smaller than
a blackbird? (Not that I've looked up the numbers.)

Yes, it is.

But as you say, sizes can definitely be tricky and it fitted the
colour/markings so worth a punt for the OP to check out some images.

Perhaps it was just a semi-albino Blackbird, like:
http://www.yorkpress.co.uk/resources...ticleLandscape

--
Chris