PDF - http://police.homeoffice.gov.uk/news-and-publications/publication/operational-policing/Safer_Detention_and_Handlin1.pdf?view=Binary
"The Police Service often provides the gateway to healthcare services for those that come into custody, but a police station is not the most appropriate place for diagnostic assessment or healthcare treatment. The guidance recognises this and strongly promotes and advises on the engagement of the right healthcare professional at the right time and in the right place."