I'm home now, so here's my Caerphilly report.
Snow line on Nantgarw Hill, just below the traffic lights (about 90m) on the grass
It got a bit slushy in the gutters on the hill up to mine at about 150m.
Looking over Caerphilly, there's snow on the fir trees by Caerphilly Golf Club from about 130m.
And the snow has stopped now that I am here to enjoy it.