Immediate access group
Participants randomized to IA will be informed that they will begin the LLTTF classes within 2 to 3 weeks.
Delayed access control group
Participants randomly allocated to the DAC group will be informed that they will begin attendance at the classes after a delay of 6 months. All participants will continue with any usual treatment as required. Use of anti-depressant medication and any new or ongoing mental health support will be recorded at follow-up using the CSRI.