In reply to yesbutnobutyesbut:
My plans were changed this morning by icy lanes, but only after I'd done a couple of miles on a treacherous lane linking two main gritted roads, doing about 8 mph and hardly daring to breathe. I'm doing 50-55 miles tomorrow, which will leave me with about 35-40 on Saturday, but as each ride so far has been at least 50 miles I'm keen to keep that going. I'm hoping it's going to set me right for the NY with a bit of endurance.
Hope you get yours done. Good luck!