I've been out testing my wet gear in the dark, rain and muck just in case. So far so good, albeit some vaseline on the rear light seals seems to be required. Unfortunately the gatorskins have started to puncture, so I think I might put the armadillos on. They are hateful to ride on, but as near bullet proof as any tyre I've used (never punctured in over 6,000 miles) and not half as hateful as fixing punctures in the cold and rain at 3am.
Generic chinese machined aluminium cree LED torches with lithium 18650 cells seem also to be immune from water (O rings in all the right places).
I also seem to have found the one pair of gloves in my extensive collection which do seem to keep my hands reasonably dry without being impossibly bulky. Gloves I find the most difficult item of apparel to get right. But we'll see. Me doing 15 miles in moderate drizzle doesn't compare with suffering 5 hours of solid downpour. Let's hope it doesn't come to that.
There's a lady from the Met Office who runs one of our local club rides on Sundays, and she says the weather is virtually impossible to forecast accurately at the moment, so be prepared for anything. Having opted out of the Whitstable ride, I don't feel I can let this one beat me.
nb. any strong headwind will be coming from the north east. Isn't that the way to Siberia? Might feel a trifle chilly.