Just taken a look at my Micro library, and consultated Tony Marshalls first "microcars" book. Sure enough it is a Gill Getabout, built in Paddington, London and production was short lived by all accounts. The chassis and Mechanicals were taken from the Astra/ JARC and the Gill coachbuilders produced two designs. A two seater (as per your picture) with a four seater produced in the hope of selling them as taxis, although regulation meant that it was to small for this purpose. There are no recorded survivors.