Hiya, nothing quite so exotic, London to Brighton 4 years running , London to Milton keynes 2 years running and London to Cambridge all for charity . My bikes light fully carbon specialized , carbon shoes , Fulcrum 3 wheels - but I have to reluctantly conclude its the rider that has to be light (me) not the bike lol
I ride with Team MK group D and would definitely recommend you join a riding group if you are not already part of one, and train for the hills
All the best