Not strictly on topic but related to biking. What’s the furthest you can ride in the UK without touching tarmac in any way (and I don’t mean jumping across roads). The route would have to be linear or a big circle i.e not gratuitous up and down forest roads in somewhere like Kielder. I found one which starts about half way between Machynlleth and Aberystwyth and comes out on the A44 by the rally school called Sweet Lamb, a distance of 32 miles. Its not all on the OS map but pretty well legal, certainly no footpaths or private land. It’s a very good day out and by simply crossing the A44 you can add another 15 miles again all off road to Devils Bridge. Any advance on this?