Participants will be randomly allocated to differing lengths of baseline phase (initial clinical assessment to first clinical session) with 4 potential arms (7, 10, 14, or 17 days). The first three clinical sessions (formulation, imagery rescripting and planning of intensive days) will take place weekly and last up to 1.5 hours. The two intensive days will last up to 4 hours each and take place shortly after the planning session and within a few days of each other. Three additional follow up sessions will be offered within 10 days of the intensive days (2 within one week, and the final session one week after). Follow up data will be collected by phone or post 3, 6 and 12 months post intervention.