The Oxford Tracked Carrier ((Carrier, Tracked, CT20)) was an early post world war two British armoured personnel carrier (APC) and artillery tractor.The Oxford was substantially larger - at 6 tons - than the 3 ton Universal carrier it was designed to replace. It saw service in the Korean war both as a tractor for the 17 pdr and as an APC. Several versions of the carrier (CT21-35R, CT23-26) are listed in Chamberlain and Ellis (1973).
References
Oxford Tracked Carrier Wikipedia(Text) CC BY-SA