Registration must be renewed every three years, for which 450 hours of registered practice and 35 hours of study must have been completed in the past three years.[2] The total number of registered mental health nurses in the UK was 48,130 in 2010, however, since then there has been a slight decrease, as some nurses have transferred over to voluntary and independent providers.[3] MHNs typically work within community or hospital settings, as part of Crisis Assessment and Treatment, inpatient environments and/or community mental health teams.[4]