Great, the Harmonie & Icon were pretty accurate on their predictions.
Looks like they were! I admin I was *very* sceptical, but it's happened all right. It's still sleet here, but more snow than rain. 1.6 / 0.9, so it's what I'd usually consider borderline for snow.
No such problems over the hills though and by all accounts it's a bit of a nightmare out there across the central belt of Kent! Accidents on the M2 and M20 and - looking at the traffic camera - quite widespread snow on the ground in higher areas.
(The MetO text forecast did mention snow, briefly, over higher ground, but interestingly the automated forecast didn't have anything even at altitude, just rain. It's flipped overnight though!)