As someone who chose and got a 16:00 start time I'm curious as to the plans of others who will also be leaving in the final wave. How many are planning to ride through the night as opposed to taking advantage of an early first night at Spalding?
My plan at the moment includes sleep stops at Spalding, Barnards Castle, Innerleithen, Coxwold and St Ives based on an overall average of 20kph. I've taken no account of what the closure times of these controls may be, accepting that my plan may not be perfect but blissful in it's ignorance.
[I'm not riding but...]
With a 16:00 start time and based on a minimum average speed taking into account the over distance aspect (1433km / 116h40) so this may not match what your brevet card will say but it's a rough guideline:-
Spalding closes at 4.56am
BC closes at 6.25am
Innerleithan closes at 4.53am
Coxwold closes at 2:57am (it's not a mandatory control but if you leave after this time you'll be behind minimum schedule)
St Ives closes at 2:53am
Those represent days of:-
159km, 313km, 276km, 271km, 294km and a final morning of 120km
So it's certainly doable although I don't like the look of those early starts from Coxwold or St Ives. Ideally you'd get one control ahead (from Eskdalemuir instead of Innerleithen) for:-
Spalding closes at 4.56am
BC closes at 6.25am
Eskdalemuir closes at 8.53am
Pock closes at 7.16am
Gt Easton closes at 8:45am
Giving days of: 159km, 313km, 325km, 275km, 313km and a final morning of 58km.
Riding through the first night? All depends on how you deal with that. Looking to stop around midnight Mon/Tue, so 32h from starting I'd be hoping to be at Brampton (554km) where I'd get a nice sleep (control would close at Tue 1.06pm for 16:00 starters). 554km at 20kph = 27.7h so that's 4.3h of stops/faffing/eating since starting. That's doable but would require some determination not to stop for too long at any controls. There are only 5 controls before Brampton (if you ignore Coxwold which is not mandatory and only 13km from Thirsk) so 4.3h still gives you 50 minutes at each of those controls (St Ives, Spalding, Louth, Pock, Thirsk).
Next day could be an 6am start and a 301km day back to Brampton (855km, control closes at Wed 1.36pm) but hopefully back by 1am or so. 15h of riding time at 20kph, so 3-4h of stop/faff/eat time. Again, 4 controls gives you ~50m at each control.
Then a 7am or 8am start for a 311km day to Louth (313km, control closes at Thu 3.05pm) again in by 2am/3am Thu. 15.5h riding time so 3.5h stop/faff/eat time.
That leaves Thursday and Friday up until 12.40pm to do the last 265km. No need for a plan for that, just ride and enjoy.
If you can maintain discipline at the controls (card stamped, bottles filled, eat, ablute, etc) and get back out on the road then you'll get more sleep. LEL'09 and PBP'11 I faffed too much at controls which ate into my sleeping time at the end of the days, still got round and had fun though.