The ST-25, bearing the RAF serial number N1531, arriving at Hanworth aerodrome on May 31, 1938.

An earlier view of the same aircraft bearing the Class B markings T42, taken the previous year.

The tricycle ST-25 photographed during its period under test by the A&AEE at Martlesham during November 1937

Further view of the ST-25, taken in 1937 when the aircraft bore the Class B markings T42. The ST-25 was powered by two 95 h.p. Pobjoy Niagara III engines.

Further view of the ST-25, taken in 1937 when the aircraft bore the Class B markings T42. The ST-25 was powered by two 95 h.p. Pobjoy Niagara III engines.