What effect overcrowded prisons have on patients with severe and enduring mental health problems.

I have asked Mike Ewart, Chief Executive of the Scottish Prison Service, to respond. His response is as follows:
The impact overcrowded prisons have on patients with severe and enduring mental health problems are many, examples include:
A direct effect on mental health as a consequence of, for example, noise, people, or lack of personal space;
It is more difficult to identify prisoners requiring additional support as a consequence of increased demands on staff to carry out other activities;
Access to constructive activity is limited as a consequence of pressure on resources;
Increased time spent isolated in cells, or enforced sharing of accommodation, or the risk of being placed in inappropriate accommodation;
A greater risk of behaviour, such as bullying, that impact on a person''s mental health,
Rapid transfer to another prison without fully adequate preparation because of pressure on an already overcrowded prison.
More documentary evidence is available in HM Chief Inspectorate of Prisons for Scotland''s Thematic Review: Out of Site, Severe and Enduring Mental Health Problems in Scotland''s Prisons. A copy can be located at http://www.scotland.gov.uk/Resource/Doc/244161/0068214.pdf.