A huge chunk of South Downs including Cissbury Ring, Chanctonbury Ring, and what seems like every single up and down along the ridge to Lewes. It’s a hard day out but well worth the effort. Thank you Jo for a beautifully crafted route and thank you Mark for the inspiration.
There is a rather splendid idea of making these UCX rides a brevet type thing, kind of like a permanent Audax. More here: