Study design: The design of the study will be a multi-centre, randomised, superiority trial, comparing MBCT online and MBCT offered as a group training with TAU. Participants in the TAU condition will be randomised to one of the treatment conditions after 3 months. Main assessments will take place at baseline (T0), post-treatment (T1), and 3 (T2) and 9 months after post-treatment (T3).