The constituency was first defined by the First Periodical Review of the Boundary Commission .
The constituency was first first used in the 1955 general election , to cover the counties of Roxburgh , Selkirk and Peebles .
The constituency was first defined by the First Periodical Review of the Boundary Commission , and first used in the 1955 general election , to cover the counties of Roxburgh , Selkirk and Peebles .