A number of display layouts were built by the factory to promote Wrenn Formula 152 at exhibitions and in local model and hobby shops. These were built to be totally functional although they could just be left as a display in shop windows.
The simplest display layout seen was an oval of track mounted onto a 6mm thick piece of plywood 32½” x 15½” painted a Terra Cotta colour. The centre section and other small areas had a thin Green foam sponge material stuck to the board to imitate grass areas but over the intervening years this has unfortunately subsequently perished. A Grandstand and a Trackside Pit were included which were push-fitted over raised timber blocks. There were also various scenery items such as Fencing, Flags and Flag Poles and even some Figures. The track itself included a Lap Counter and a Deflector Section and to promote the latter unique element a special short piece of Barrier Fence with unique printing was produced. This was printed in Red with an angled arrow pointing to the Deflector operating button and the words ‘OVERTAKING THREE CARS ON EACH LANE’. This Barrier Fence section also featured an angled end to emphasize the arrow. A special cardboard banner was printed in three colours, a Turquoise background with Yellow & Red which was 18⅞” x 3½” overall and then folded horizontally. It featured the standard Cooper illustration to the left, ‘WRENN formula 152’ in Yellow & White and ‘FOR REALISTIC MODEL MOTOR RACING’ in Red to the right hand side. This was stapled together so that it could be fitted onto two polished stainless steel rods which were fitted vertically to the base via holes in flat timber blocks. The examples seen of this version of layout have included Trackside Pits with Maserati and Vanwall pit boards and also, since the banner includes the Turquoise colour, it is assumed that these were built from 1962 onwards. One layout has been seen with E1 Controllers secured to the corners at opposite ends of the base with the separate rails and another with Mk II Controllers but these may have been a later modification by the owner.
The second version of display layout seen is more interesting and larger being the one featured in the 4th version of the A10 – ‘152’ Instruction Manual with a photograph and accompanying layout plan therefore dating its probable production during 1962. This was fitted onto a substantial timber frame with a plywood top being 4’-6” x 2’-6’ overall. This was painted, similarly to the other display layout baseboard, with a Terra Cotta coloured paint. Since the layout was on two levels the Track was supported on timber blocks as well as items from the Grey polystyrene T30 – Bridge Support Set. A Green Landscape Sheet was used to imitate grass and to cover the landscape areas. This layout included a Deflector Section, two Trackside Pits, with Cooper and Ferrari pit boards, as well as various items of Fencing, Flags and Figures. The landscaping of the layout was improved with model trees, a small river section, a supporting brick wall and even included some of Wrenn’s Model Railway items such as track, points, buffer stop, a signal box and a tunnel entrance. These elements were used on other subsequent factory-built layouts to enhance the overall appearance.