This was the twilight of the microcar and the introduction of the MINI in 1959 would see major changes in the public's attitude towards their cars. Dundalk saw the writing on the wall and decided to sell.
Peter Agg, Lambretta distributor for Britain since 1950, had purchased the long-lived commercial vehicle firm of Trojan of Croydon in Surrey in 1959. He negotiated the deal for the manufacturing of the Heinkel-I by Trojan, while getting the supply of motors from Heinkel themselves. Essentially similar to the German Heinkel and Irish Heinkel-I, the Trojan was built with some British-sourced components such as Armstrong shocks, Wilmot-Breeden latches and Wipac or Miller lamps. Vent Windows were Plexiglas. A right-hand-drive version was built, but the door was still hinged on the left. Three AND Four wheel versions were made.
The car did actually sell quite well, despite its late arrival and plans were even made to expand the range with a commercial light delivery van, of which six or so were built. http://microcarmuseum.com/tour/trojan-2.html also has a full gallery of a museum restored Trojan