During his time in England, Lamberton stayed near the Tweed so that he could maintain connections with the parts of his diocese under English rule. Lamberton also wrote a letter to Philip of France asking for the King to help him gain freedom from England.
Lamberton's decision to reside near the Tweed River highlights his desire to maintain ties with his English-controlled territory while seeking support for his freedom from England. His letter to Philip of France reflects a plea for help in achieving this goal.