2009-06-21 Sun - BHF London to Brighton

The highest gear I've done the whole L2B (and Ditchling) was 47x15 (84 GI) but I cheated, stopping at the foot of Ditchling to rest for 10 mins, smoked a rollie, ate an ice cream, then stomped the pedals all the way up the Beacon, pee'ing off all the geared geezers walking up :) Also had the secret weapon of some super long 177.5mm Campag 'climbing' cranks then!

Confused: crank length is one component of GI calculation. Sounds like you were on fewer gear inches than you thought.