Table 1.

NHS trust and team characteristics

NHS trust	Trust characteristics	Team	Team characteristics
Trust 1	Serving a large and relatively affluent city in the south of England	ADU	A new service at the time of study recruitment, closely linked with the local CRT and located nearby. Provides primarily psychoeducational and psychological group sessions
		CRT	24/7 service offering assessment and home treatment, open referral process (e.g. patients can self-refer)
Trust 2	Serving an inner-city area of a major metropolitan centre	ADU	The service has operated for around 15 years, and is closely linked with the local CRT and located on the same site. A diverse and strongly arts-based programme of sessions, e.g. art, dance and drama therapy
		CRT	24/7 service, offering assessment and home treatment, open referral process
Trust 3	Serving a medium-sized city in the Midlands	ADU	Operating for around 7 years, with close links to the local CRT and located on the same site. Provides mostly activity-based sessions, e.g. arts activities, gardening etc.
		CRT	24/7 service, offering assessment and home treatment. Referrals are made by health professionals
Trust 4	Serving a commuter town and rural area near a large city	ADU	The service has operated for around 6 years, with links to the local CRT, but not based nearby. Provides mostly psychoeducational and psychological sessions
		CRT	24/7 service, offering assessment and home treatment, open referral process

NHS, National Health Service; ADU, acute day unit; CRT, crisis resolution team.