04/30/2019. Remarks by Johan Visschedijk: "A variant of the Hampden which never saw operational service was the Hereford. This differed from the Hampden in being powered by l,000 hp Napier Dagger sixteen-cylinder H-type in-line engines instead of the Pegasus radials, and the Air Ministry ordered 150 aircraft, as insurance against expected delays in Pegasus production. The Hereford was built to Specification 44/36 and production was the responsibility of Short & Harland at Belfast.

The original trial installation of Daggers was made in a modified Hampden, L7271, which first flew in October 1938. The first production Hereford, L6002, flew at Belfast on May 17, 1939, and the aircraft entered service in 1940, equipping one flight of No. 185 Squadron (the other two flights flying Hampdens), but the Hereford was used principally as a bomber-crew trainer at No. 14 Operational Training Unit, Cottesmore, and No. 16 OTU at Upper Heyford. Herefords were first delivered to No. 14 OTU on May 7, 1940. Subsequently 20 Herefords were converted into Hampdens by fitting Pegasus radials.

Coded "GL-A2" the pictured aircraft initially belonged to No. 185 Squadron, later to No. 14 OTU."

(Note: The original print from which Aeroplane Photo Supply copied this image, shows three aircraft.)