Yup - if you don't mind riding up to Peckham, then you can cut through the "surrey canal" path (there is no canal), then Burgess park. Back roads to and past Elephant & Castle and then up to Waterloo. That gives you c. 40% of the ride off road, but on tarmac'd paths. Also Rocket Van Hire on Brandon St do a nice coffee.
Yup - if you don't mind riding up to Peckham, then you can cut through the "surrey canal" path (there is no canal), then Burgess park. Back roads to and past Elephant & Castle and then up to Waterloo. That gives you c. 40% of the ride off road, but on tarmac'd paths. Also Rocket Van Hire on Brandon St do a nice coffee.
Like this: https://ridewithgps.com/routes/13384414
Also, if you want to cut out Waterloo at the end you can cut through to Webber St and pop out by The Cut.