Yes, sort of. Here is the maths, taking Tim as an example. (Those of faint disposition, look away now.)
Tim started at 9.15am so must finish by 05.55am on Friday morning.
He is at Thirsk now (6pm on Wednesday), exactly 1,000k. He says he'll press on to Pock (65k), I guess he might arrive about 10pm maybe. At this stage he will have just under three hours in hand. (Hence his decision to have 2.5 hours of sleep.) Pock is 1,065k and then he will have 354k to go. Leaving Pock at say 00.30 on Thursday morning means he has to stay above a total overall moving average of 12.2kph - including traffic lights, eating, etc.
So that is the bare maths.
Tim will know all this and I bet he's gone over and over all the permutations of timing, eating, sleeping, speed, time on the bike, in his head a thousand times. After Pock he'll be in the dark for a few hours on Thursday morning, then daylight (weather forecast is warm and hot which is no blessing) and then in the dark from 10pm onwards on Thursday night. There are four controls for him and all they will be concentrating on is shovelling food into exhausted, red-eyed, locust-like cyclists and getting them back on the road.
In his favour:
- after Market Rasen it is pan-flat Lincolnshire lanes
- the forecast is dry not torrential rain although a headwind is forecast
- he's Tim and he'll make it
My tracking site consolidates a load of riders into one place and does a lot of the maths for you. Tim is already on there (trickedem):-
http://www.greenbank.org/cgi-bin/lel2013.cgi
Tim: http://www.greenbank.org/cgi-bin/lel2013.cgi?action=riderreport&rn=R32&
Feel free to PM or email (alex@greenbank.org) me with any other names/rider numbers you want added.