- Members of Police Authorities
- Clerks to Justice
- Clerks to Courts
- Members of employer's police forces
- Holders of liquor licences, managers of licensed houses and their husband or wife
- Licensees of betting and gaming establishments and lottery promoters
- Bailiffs and Warrant Officers
- Probation Officers
- Members of private security organisations (whether directors, partners or employees)
- Includes security personnel, guards, door staff
- May also include Prison Custody Officers
- Private detectives and enquiry agents
- School crossing patrols and traffic wardens
- Members of Fire Services (but see below)
- Members of the Armed Forces (see below re TA)
- Members of medical, nursing and midwifery professions, and Ambulance Service (unless written permission is given by their employing NHS Trust or Health Authority)
- Neighbourhood, street wardens and other uniformed patrol wardens
- Highways Agency Traffic Officers
If you are a member of the reserve forces (i.e. Royal Navy, Army, Air Force) then you can join the Special Constabulary, and the same works in the opposite directions (i.e. Specials can join a reserve). It may be that police forces have local policies which would go against this, however it seems likely that under the "unfair treatment of part-time employees regulations" or the Human Rights Act any appeal would be successful anyway.
Some forces also exclude staff who hold certain full-time occupations in the police service, such as Civilian Detention Officers and front office staff. Check with your force.
Although some forces, including the Metropolitan Police, still won't accept members of the fire service into the Specials, it appears that others will. If this affects you, then check with the recruitment department of your chosen force to be sure.