 One of two prototypes ordered on 1 January 1944 to Specification S.28 / 43 . The airframe was sold by the Controller of Supplies ( Air ) to Blackburn on 17 April 1950 . 
 One of two prototypes ordered on 1 January 1944 to Specification S.28 / 43 . The airframe was sold by the Controller of Supplies ( Air ) to Blackburn on 17 April 1950 . 
One of two prototypes ordered on 1 January 1944 to Specification S.28 / 43 . The airframe was sold by da Controller of Supplies ( Air ) to Blackburn on 17 April 1950 .