No. 228 Operational Conversion Unit was a Royal Air Force Operational conversion unit. It was formed in No. 12 Group at RAF Leeming from Nos. 13 and 54 OTUs in 1947. The tasking of the OCU was the training of night fighter crews and its aircraft were the de Havilland Mosquito, Gloster Meteor, Bristol Brigand, and Gloster Javelin over the years. The OCU lasted until 1961 at Leeming when it was disbanded.