Berwick-upon-Tweed is a town in the county of Northumberland. It is the northernmost town in England, located 2½ miles south of the Scottish border, at the mouth of the River Tweed on the east coast. The land is situated off Northumberland Road immediately adjacent to the East Coast Main Line on the south bank of the River Tweed. Berwick-upon-Tweed is approximately ½ mile to the north of the site. mile to the north of the site.