 Complete the following phrase:  In October 1974, 111 Squadron converted from the Lightning to the Phantom FGR.2, becoming the first unit to operate the type in the air defence role notwithstanding 43 Squadron, which had used the FG.1 version since 1969. As more Jaguars were delivered, Phantoms were released enabling existing Lightning squadrons to be converted; 19 Squadron and 92 Squadron, the forward deployed air defence units in Germany, converted in 1976 and 1977 respectively, at the same time moving from RAF Gütersloh, which was the closest RAF base to the 