Criminal Records Bureau Checks: Guidance for volunteering /Cabinet Office, 4 June 2008
PDF - http://digbig.com/4xarb
"This guidance clarifies when organisations that use volunteers do and do not need to carry out Criminal Records Bureau checks on volunteers. The guidance will help cut unnecessary red tape and responds to concerns voiced by the voluntary sector that potential volunteers can be put off if they are asked to undergo a Criminal Record Bureau check without good reason."