6.-(1)Except in such cases or classes of case as the Secretary of State may prescribe,a person carrying on an employment agency or an employment business shall not demand or directly or indirectly receive from any person any fee for finding him employment, or for seeking to find him employment.
(2)Any person who contravenes this section shall be guilty of an offence and liable on summary conviction to a fine not exceeding £400.
The original legislation is tucked away in section 6(1) Employment Agencies Act 1973.
http://www.legislation.gov.uk/ukpga/1973/35/enacted
6.-(1)Except in such cases or classes of case as the Secretary of State may prescribe,a person carrying on an employment agency or an employment business shall not demand or directly or indirectly receive from any person any fee for finding him employment, or for seeking to find him employment. (2)Any person who contravenes this section shall be guilty of an offence and liable on summary conviction to a fine not exceeding £400.