You'll actually find it harder than most. Edinburgh is the most blah stop. It's soooo far already, and there is sooooo far to go. The stop is in an anonymous southern suburb. It's the long dark tea time of the soul. I know I helped one rider make his decision to DNF and head off to Edinburgh station, and I saw a few more drop out there. With the siren song of your house, and your bed and your shower calling, it will be hard to head turn south and cycle away from them.
(I dropped out halfway back when I found out the next control was about to close and I was an hour away)