Although sometimes seen as a bastion of royalism, the northern counties supplied some of the most militant members of the Long Parliament. Northern MPs and peers figured prominently in the war party, played a key role in negotiating the Solemn League and Covenant, and comprised an important element within the anti-Scots, pro-New Model Army faction at Westminster. Anglo- Scottish relations in the Civil War period were intimately linked with the parliamentary history of the northern counties during the 1640s. This article examines the development and structure of the northern interest in the Long Parliament, and in particular its collaboration with the parliamentary Independents. Analysis of the drafting of the Newcastle peace propositions and of the Commons' efforts to reduce the size of the Covenanting forces indicates that the Independents relied heavily on evidence of abuses committed by the Scottish army in the northern counties to advance their own programme for settlement and to frustrate that of the Scots and their English allies. It is also argued that the Independents' exploitation of the northern reaction against the Scots had a profound impact upon the relations between all three Stuart monarchies.