In January 1953 he was posted to the Plans, Policy & Operations Division of SHAPE, based in Paris. He remained there until January 1955. In April he was assigned Air Officer Commanding 12 TS, and oversaw their conversion to Meteor jets at RAF Weston Zoyland in Somerset. He was then promoted to group captain and appointed air attaché in Teheran. He held this post from July 1955 until he retired in September 1958. Pelly-Fry retired from the RAF in 1958. He had been noted for establishing an easy rapport with leading figures in NATO. His relationship with the Shah of Iran’s regime had proved of value in generating substantial export business for Britain's aviation industry. Upon retirement Pelly-Fry was immediately engaged by the Commonwealth Office as their Civil Air Adviser, British High Commissioners in Australia and New Zealand. He remained in this post, working out of Melbourne, until late 1962. He then joined the aircraft manufacturer Handley Page, where he worked from 1963 through 1966. After leaving Handley Page he went into the food business. He trained in Harrods’ Food Hall, and then opened a delicatessen of his own in Sussex. He called his deli "Epicure of Chichester". He ran the business with his wife for a number of years before selling it and retiring to Somerset, where they lived near Naval Air Station HMS Heron. Pelly-Fry's proximity to a working airfield soon had him thinking of flight again, and he resumed his hobby of 50 years earlier, model aeroplanes. He first designed and built a 10 foot wingspan sailplane. As opposed to his creations from the late 1920s, his new model aircraft was radio-controlled and had working flaps and leading edge slots. Built by Pelly-Fry, it was flown by expert modelers comfortable with radio-control, and flew beautifully. Next Pelly fitted a small engine and demonstrated the craft's ability to stay aloft at extremely slow speeds. He then designed and constructed a miniature air speed indicator and fit it into the nose of the airplane. The unit confirmed that with flaps and leading edge slots deployed the aircraft could stay aloft at the airspeed of a brisk walk. With this technical success in hand, Pelly-Fry set about creating model aircraft that depicted those he had flown, starting with the plane he flew with 88 Squadron, a 1/10 scale Boston bomber with markings 111A RH-A and painted in the livery of the day.