Dunno where you are starting from, nor heading too, but possible options are Ferrybridge (opened a week ago) to the South, or Instavolt a bit to the North (no idea if that is a rubbish idea, nor what availability is like), or go up the West coast (even for Edinburgh that can work out ...).
ABRP London-Edinburgh says 34 mins at Scotch Corner, and 5h53m driving (398 miles)
If I say "Avoid Scotch Corner" ABRP says 37 mins at Ferrybridge (with a bit of a detour off the A1) and 6h1m driving (374 miles - compromises on more direct, shorter, route Scotch Corner to Edinburgh, for range)
If I say "Via Penrith" ABRP says 23 mins charge but also charge at Charnock Richard (for 6 mins - so if hit traffic then might make Penrith) and 6h5m driving (402 miles)
Scotch Corner has GridServe 3x 60kW - which might not be that much slower, particularly if there is a wait at Supercharger. GridServe shows availably
on their website.
Couldn't find Ferrybridge on PlugShare nor Zap-map ... are these systems dying a death now? PlugShare inability to filter above 50kW is a nuisance, and ZapMap need to filter on every possible combination likewise ... and the way it lists each stall (on Web at least)