I went for a walk from Holystone and eventually found the small section of Roman road uncovered by archeological excavations. It's at 55.309691,-2.102539 if anyone is interested. I went here a couple of months ago with a u3a natural history group but last time I visited I couldn't see where we had turned off.
Here's a local news article about the dig: https://www.northumberlandgazette.co.uk/news/people/archaeological-dig-in-rural-northumberland-given-the-go-ahead-thanks-to-grant-3403581