Health of the Nation Outcome Scales for People with Learning Disabilities are designed for use with people with a learning disability with mental health needs irrespective of the degree of their disability. HoNOS-LD has been tested for inter-rater reliability, convergent reliability, validity to change and acceptability in a national pilot study. Results demonstrate a good inter-rater reliability and a level of sensitivity to change that was acceptable to clinicians working in the field. A final report, HoNOS-LD pack, and training instruments are available.