Arctic survey - how well prepared is Lewisham for snow?

We're currently torn between schadenfreude as we sit 8,000 miles away reading tweets from Brockley residents struggling with snow-induced transport chaos and fear that we're about to get our comeuppance and be unable to fly back to a UK airport. In either case, we're staying out of this debate, but Fintan wants to know what BC readers think about the area's preparedness for this early flurry of snow. He writes:

Am I the only one who thinks that Lewisham council has simply abandoned the idea of gritting anything other than the major roads?? I cycled: Aspinall, Frendsbury, Turnham (over the rail bridge which was particularly dangerous!!) & Dalrymple without any indication whatsoever of any attempt to grit.

Likewise on the other side of Brockley & Adelaide, St. Margarets, Chalsey, Tresillan, Harefield this morning walking – again no sign or evidence whatsoever of any attempt to grit!! ALSO – the overground was not working on the Brockley line south of Surrey Quays – BUT was running fine into New Cross. Does this suggest that that overpass at New Cross Gate is particularly vulnerable to snow and ice?