If your organisation is a member of HEMSA you are entitled to access the member's download section which contains a range of documents not accessible to the general public.
HEMSA is a trading name of Highway Electrical Manufacturers and
Suppliers Ltd. a company limited by guarantee, registered in
England and Wales no. 06458803 Registered Office Highdown
House, Littlehampton Road, Ferring, West Sussex BN12 6PG