The only randomised controlled trial to test high-fidelity assertive community treatment (ACT) in the UK (the Randomised Evaluation of Assertive Community Treatment (REACT) study) found no advantage over usual care from community mental health teams in reducing the need for in-patient care and in other clinical outcomes, but participants found ACT more acceptable and engaged better with it. One possible reason for the lack of efficacy of ACT might be the short period of follow-up (18 months in the REACT study). This paper reports on participants' service contact, in-patient service use and adverse events 36 months after randomisation.