As part of this project, and in addition to the choirs already run by Tenovus Cancer Care, Tenovus will fund two choirs, one at each of the Royal Marsden sites. These will run on a weekly basis for 18 months and will consist of a session lasting 1 hour led by a professional choir leader who is a member of the Tenovus Cancer Care staff. The choirs will be open to anybody affected by cancer at the Royal Marsden Hospital or in the local area. However, there will be three cohorts of patients involved in the research running alongside the choir: cohorts A and B involving active recruitment of participants and Cohort C in which people who join the choir of their own volition but are not eligible for the first 3 cohorts will be invited to participate: