Can someone please tell me how many miles the route is 1 way? Struggling to find online.

Wouldn't be surprised if it's over 100 miles.

A very rough guide using the Google Earth line tool suggests something around 88 to 90 miles depending on how accurate you line drawing is. Mine is rough lol. Try yourself on Google Earth

82.5 miles

Thanks

Is that from Berwick via Seahouses into Alnwick then out of Alnwick via Morpeth to Newcastle