Northern Ireland Mr. Wm. Ross asked the Secretary of State for Defence how many small arms are held in Northern Ireland by the Army; and what is the number of each type, excluding weapons held by the Ulster Defence Regiment. Mr. Mason It would not be in the interests of security to disclose details of the small arms held by the Army in Northern Ireland. Mr. Wm. Ross asked the Secretary of State for Defence how many small arms are held by the Ulster Defence Regiment in Northern Ireland. Mr. Mason It would not be in the interests of security to disclose details of the small arms holdings of the Ulster Defence Regiment.