The British Security Industry Association (BSIA) have launched a special offer exclusively to National Security Inspectorate (NSI) gold and silver installer companies inviting them to take advantage of the Association’s membership and the long-term commercial value of belonging to the recognised ‘voice of the professional security industry’. Companies working in the installation and service of fire and security alarms market are invited to see for themselves the five key reasons they should join the BSIA, with the extra added bonus of ...