If you are already receiving support from mental health services you should have a care plan. This will include details of who you should contact in a crisis.   

If you can't find your care plan: 

During the day 

Contact your Community Mental Health Team (CMHT) and ask for your care co-ordinator or the person on duty. 

During evenings, weekends or bank holidays 

Call your local crisis team

Entry credit - Rethink Mental Illness