Offa’s Dyke’s gotta be in there and the SDW.
I doubt SDW will be in there as its not an ancient track.
I suppose there must of been a track of some sort along Offa’s Dyke, but it not really a trade route track like Icknield way/Ridgeway.
I’d hazard a guess we might get some sort of Pilgrimage route either to Canterbury or Saint Davids but thats more “middle age” than “ancient”.
To be honest he’s done the 2 big ones I’d think of as ancient, and to some extent they are the same track, the ridgeway finishing approximately where the Icknield way starts.
Could do a Roman road, like the A5 watling street I suppose but not really in the same vein as the previous episodes.
Dorset Ridgeway is one Julia Bradbury did on the BBC version.