The strength of the airlanding brigade almost equalled that of an airborne division's two parachute brigades. To support the four infantry battalions, the brigade also had its own artillery, engineer and reconnaissance units until 1942, when they became divisional assets. Another change that affected the brigade occurred in May 1943, when the Ulsters and the OBLI left to form the 6th Airlanding Brigade, of the 6th Airborne Division. When the brigade returned to the United Kingdom, it was assigned the 7th Battalion, King's Own Scottish Borderers (KOSB) in December 1943, a 2nd Line Territorial Army unit, which had until then been on home defence duties, stationed in the Orkney and Shetland islands.