After Oman, 22 SAS Regiment were recalled to the United Kingdom, the first time the regiment had served there since its formation. The SAS were initially barracked in Malvern Worcestershire before moving to Hereford in 1960. Just prior to this, the third SAS regiment was formed and like 21 SAS was part of the Territorial Army. 23 SAS Regiment was formed by the renaming of the Joint Reserve Reconnaissance Unit, which itself had succeeded M.I.9 via a series of units (POW Rescue, Recovery and Interrogation Unit, Intelligence School 9 and the Joint Reserve POW Intelligence Organisation). Behind this change was the understanding that passive networks of escape lines had little place in the Cold War world and henceforth personnel behind the lines would be rescued by specially trained units.