A little more info....
Firstly my route. In future I'll get more advice from those who know, but I made my return based on Sustrans and points of interest. What I should have done was taken
@ianrauk route out of Sarfend and then dropped down to the ferry at Tilbury. Then I should of have got
@Trickedem route to Whitstable. However such is the folly of the inexperienced. Next time I'll start with a map and work from there rather than plotting software!
Anyway, here are the stats.
View: https://ridewithgps.com/trips/13367408