 Complete the following phrase:  The unit was formed in 1950 and in April 1956 moved to 4th Armoured Division in the same role. In November 1957, the regiment was reorganised and re-titled as Headquarters Royal Engineers, 4th Division and moved to Paderborn, Germany. By 1969, it was expanded in size and in 1970, the regiment moved to Iserlohn. From July to November 1974, the regiment was tasked as an infantry unit and served in 