Anglo-Scottish border English king, Edgar the Peaceful, at his council in Chester. After Kenneth had reportedly done homage, Edgar rewarded Kenneth by granting him Lothian. Despite this transaction, the control of Lothian was not finally settled and the region was taken by the Scots at the Battle of Carham in 1018 and the River Tweed became the "de facto" Anglo-Scottish border. The Solway–Tweed line was legally established in 1237 by the Treaty of York between England and Scotland. It remains the border today, with the exception of the Debatable Lands, north of Carlisle, and a small area around Berwick-upon-Tweed, which was taken
River Rea, Shropshire River Rea, Shropshire The River Rea is a small river that flows through south east Shropshire, England and passes just to the east of the small market town of Cleobury Mortimer, before entering the Teme at Newnham Bridge in Worcestershire. Its waters eventually reach the Bristol Channel, via the Severn. The upper stretch of the river is known as the Rea Brook (not to be confused with the Rea Brook which flows from Marton Pool to the River Severn in Shrewsbury). For a short stretch between Cleobury Mortimer and Neen Sollars the river forms part of the Shropshire-Worcestershire border. It