Can I offer some unasked for advice? Unless you live very close to Morecombe (and I am guessing you don't), put a rug in your car. Also a thermos to fill with coffee. It looks like you have planned a fair amount of time to sleep, but if you driving home, and you can't keep your eyes open, it's nice to have plenty of options (eg caffeine or sleep) rather than just praying you stay awake.
The 'winner' took 18 hours last year? That's minimum speed for audax. I think it must be a spectacularly intense ride. I salute you!