Yes, I totally mis-read the conditions when we set out.
It was sunny and warm, so I set out in shorts, with a thermal top under a short-sleeved top.
The utter folly of this became apparent once the sun went in, the wind picked up and the first flurry came through.
By the time I'd done half an hour into a biting headwind and the third flurry had flayed me, I cut and ran for home.