The Government support the use of closed circuit television in tackling and reducing crime. CCTV is most effective when used along side other measures.
CCTV can also assist the detection of crime in public places and provide evidential material in identifying offenders.
A recent report by the Campbell Crime and Justice Group
http://db.c2admin.org/doc-pdf/Welsh_CCTV_review.pdf
which includes UK membership and whose review was part funded by the Home Office, included the observation that CCTV is more effective in reducing crime in the UK than in other countries.