36,500km in 365 days - Cycling Against Living Miserably

riding round the British coastline

Anna Hughes, too, a few years earlier (and I imagine loads of people will have done it and that there are more books that have been forgotten):

https://totalwomenscycling.com/longform/eat-sleep-cycle-anna-hughes-tells-us-what-its-like-to-cycle-the-coast-of-britain

a guy charging for photos to be taken beside the sign. He thought he would wait until after the guy left and take a selfie. Unfortunately, come 5pm and the guy was packing up, he also took the sign with him!

Skinflint cyclists never disappoint, do they? :)