This established the Anglo-Scottish border in a form that remains almost unchanged to modern times (the only modifications have been regarding the Debatable Lands and Berwick-upon-Tweed).

[2] The treaty detailed the future status of several feudal properties and addressed other issues between the two kings, and historically marked the end of the Kingdom of Scotland's attempts to extend its frontier southward.

The papal legate Otho of Tonengo was already in the Kingdom of England at Henry's request, to attend a synod in London in November 1237.

[10] The treaty gained additional prominence due to the chronicler Matthew Paris (c. 1200–1259), who is known for his rhetorical passion and his invectives against those with whom he disagreed.

Paris describes the Papal legate Otho in negative terms, as someone who was weak and timid in the face of strength but overbearing in his use of power over others, and as someone who avariciously accumulated a large amount of money.