Not much in depth at PRONI regarding Shorts and the Hiller. What I hoped would be a brochure turned-out to be just a promotional photo.
Another Shorts album contained a series of photos apparently relating to comparative trials several years earlier before chosing a type to license. Unfortunately no text accompanying:
1. May 1954, RN Hiller HT.Mk.1 XB521 being tested, didn't look like Sydenham in the background.
2. June 1954, Djinn F-WGVH clearly marked SO-122102. One of the two prototypes, first flew in December 1953. Seemed to be much interest in the tip-jet design, lots of photos of the rotor hub.
The Castlereagh office developed a two-seat non-motion helicopter simulator by 1957 which used a concave screen ahead of the simulated cockpit, onto which was projected the image relayed from a video camera moving across a small-scale model scene. Presumably the camera mount moved according to displacement of the controls.
Next subject to research: original proposal to have 502 Squadron RAuxAF based at Newtownards. Eventually the decision fell to Aldergrove, how history might have been different if Ards had been chosen. Vampires cavorting over Smudge Manor? Yes please!