Looked like a thrush in flight but the photo shows distinct dark and light colouring- seen in a country lane in Cheshire this morning- any ideas?

Just because of my user name I’m tempted to offer ring ouzel but their white patch is just a ring and not as extensive as this, not to mention that it’s vanishingly unlikely that you would see one in a country lane in Cheshire, so my only suggestion would be a leucistic blackbird.