The Mental Health Foundation and SignHealth (then called Sign) produced a Charter of mental health rights. The Charter listed what rights a Deaf person should have when being seen by a mental health service.
The charter is a ten point document and calls for a range of things, including access to mental health information in the way the patient would most like it. That might be sign language, it might be simple English, or even pictorial. They should all be offered and the patient should be free to choose which they prefer.
It also called for interpreters to be offered by right to patients who want to use BSL.
A number of health trusts and bodies signed the Charter and there was also endorsement from the Health Minister.
You can download and read a full copy of the charter here.
There is a poster too which you can see here.
And a briefing paper here.