NSSL is an independent company established to work in partnership with NSI. Its purpose is to offer support services that are not the remit of NSI, but are for the benefit of approved companies and other parties interested in fire and security services.

NSSL is financially independent of NSI. NSSL can draw on the expertise of specialists in the fire and security industries to offer an increasing range of services including training courses, seminars, specialist documentation and on occasions, unique product offers.