As this thread is getting a little old, a few of the early links don't work any more. I am having real trouble finding out how to obtain police records.
From what i can make out from the above my best bet is to actually go to National Archives - Kew to get any info. I have tried searching:
http://www.nationalarchives.gov.uk/catalogue/RdLeaflet.asp?sLeafletID=104But to me the website doesn't make any sense.
On the 1861 Census my GrGrGr Granddad (Joshua Luetchford, Born: 1821, Living: Elder Road, Norwood) occupation is listed as Police Constable. I would love to find out more. Anyone off any advice? Is it worth me posting a "Lookup request"
Sorry for my ignorance, a bit of a newbie on this FamilyTree business!

Cheers
Stewart