It looks like he's doing a flatter route than the North Cape tarifa race, which makes sense if he's going for a time - should be pretty flat until he gets to the Pyrenees.
Don't know him but seems a good bloke and does interesting work on stuff like blonde wigs Vs helmets.
Hope he gets the record!
http://drianwalker.com/toptobottom/
aiming for the north to south across europe record
6100km in less than 21 days, 14 hours and 23 minutes.
walker is pretty fast, having won the North Cape last year.
edit: unsupported, too.