mstuk.orgMultisystemic Therapy MST MST
039;Don't be left in the dark: children and young people's mental health'. Click here to read the Local Government Associations short guide to children and young peoples mental health, part of. MST is an intensive family and community based intervention for children and young people aged 11-17, where young people are at risk of out of home placement in either care or custody due to their offending or having severe behaviour problems. MST teams in the UK and Ireland. Multisystemic Therapy (MST) in the UK.