Its coupé body was made of glass fibre from a single mould and formed part of the structure when mounted to the tubular steel chassis.

The front suspension incorporated modified upper and lower wishbones of various Triumph cars: the TR4, TR6 Spitfire, and Herald.

[3] The first prototype G15, painted in 'moonstone white' was exhibited at the 1967 International Motor Show at London's Earl Court next to Ginetta's G12 racing car.

[5] The interior got a revised dashboard with Smiths and AC gauges and an improved steel-tube frame and fiberglass form seats.

The original wheels with aluminium trim were replaced with Cosmic or Minilite alloys as displayed in a 1969 motor show.