Hesham, your image shows one of several 10-ft span models, built by Fairey Research and Armament Development Division at Heston. These models had a similar delta-planform to Fairey's F.D.1. They were not used as targets, they were made to help Fairey gain some experience with delta wings.
Power was provided by an RAE-designed and Fairey-built Beta 1 bi-fuel (hydrogen peroxide and methanol hydrazine) engine with two combustion chambers - 1800 lb thrust. It also had two solid-fuel (cordite) boosters, 600 lb thrust each, to help it get off the ground.
With large amounts of cordite in steel cases alongside a fuselage with ample amounts of 80 % proof hydrogen peroxide inside, all the ingredients were present for some very satisfying fireworks. After two near-accidents, the RAE elected to no longer conduct launchings from land, but rather from the tank-landing craft HMS Suvla, which was routinely sent out on Cardigan Bay, accompanied by two tugs.
And a rescue launch.
Further deliberations caused trials to be conducted in even more distant parts of the Commonwealth, to wit the Long-range Weapons Establishment at Woomera, Australia.
This is from the Fairey-Putnam by H.A. Taylor, which shows your image with a caption that reveals it was taken at the 1952 SBAC show.