Steve's Strava post indicated that he did the same route today as yesterday. 332.8km. Still edging forwards, but it's a massive task ahead. I reckon he needs to take the same approach throughput the winter, taking no notice of the shorter days if he can, but only reducing his mileage when the weather makes it dangerous/too difficult to carry on.
If this approach does work and he is still close to the pace by early summer, then hopefully he can start a sprint finish over May, June and July.