Steve
This appears to be the only site with such an early time for sunrise.
On various other sites (including the Met Office)
Nautical Twilight (first light) 03:40
Civil Twilight begins (dawn) 04:41
Sunrise 05:24
The ride will start at 05:24.
This has always been a sunrise to sunset ride not daylight, twilight or anything else. To get the special certificate you will need to leave after sunrise and be in Jog for sunset. I will witness the start and end and record odos.
There is nothing to stop you taking longer but you will need to complete the paperwork in the normal manner and submit it for verification.
If by chance I do not make the finish due to some unforeseen circumstances you will need an end witness and receipt.... from the bar. So take some witness forms with you.
This is not a race. The aim is to complete the ride safely with in the available time which is doable at normal iron butt average speeds.
I'll be riding down Saturday morning but will be in the carpark before 5am.