Designed against British Army specification HR.144T for an inexpensive, small helicopter.
| C/N | Built as | Year | History |
| f.9423 | | 1955 |  XJ924 : Initial prototype, ff 14 Aug 1955. Shown at Farnborough+
|
| f.9424 | | 1955 | XJ928 : 2nd prototype, ff 20 Mar 1956, to G-AOUJ Aug 1956. Tria+
G-AOUJ International Helicopter Museu : recovered from scrap yard, stored Harlow. To Helicopter+
|
| f.9425 | | 1956 | XJ930 : 3rd prototype
|
| f.9426 | | 1956 | XJ936 : ff 24 Aug 1956; to G-AOUK, in attendance at Paris Air S+
|
| f.9427 | | 1957 | unknown : First of two extra airframes, retained for ground reson+
|
| f.9428 | | 1957 | G-APJJ : Trials with Royal Navy 1958, abandoned. To RAE Bedford+
G-APJJ Midland Air Museum : Preserved Midland Air Museum, Coventry, by Jul 1979 in +
|
6 C/N. 
