Singlespeed and work out what trails will be dry and when
For example, riding single speed forces me to ride quicker on my own, and the lack fo skipping gears makes me faster on technical stuff as I’m more inclinded to get in a half pedal stroke between corners rather than just swapping feet over. It also makes bike maintenance a none issue over the winter.
As for dry trails, I know Swinley will always be OK if not perfectly dry, and dries out in only a couple of days. The chilterns on the other hand require a good dry week, or the mercury to drop below zero for a few dys to make the ground as hard as concret.
When neither’s an option I go on the road bike.
And commuting 3 weeks a month helps a lot with fitness, and just riding for fun on the 4th week makes it feel like both a rest, and re-charges my motivation to get off road.
Despit the crap conditions with a bit of planning I’ve had the best winter in years! Feels like I’ve barely missed summer, and with more riding I’ve appreciated the seasons more, the last few years its been like Summer + those horrible 3/4 of the year I couldn’t ride, with some good kit choices (warm clothes and SS) my ridings been almost as fun as the summer!