Micronauts was the North American rebranding of the Japanese line of Microman toys released by Takara. Mego handled the license in the US, while in the UK it was the companies Airfix and Lion Rock. Airfix also handled the license for the German market. You can read more Micronauts info here by Ron Pringle.
British company Airfix began producing model kits for the mass market in 1952. The company produced a wide range of kits aimed at all types of scale modellers. Themes and subjects included military aircraft, civil aircraft, ships, galleons, cars, space, figures, dioramas and military vehicles.
Airfix was founded in 1939 by Nicholas Kove, a refugee from Hungary who originally manufactured rubber inflated tyres.
Information reproduced with thanks from the Airfix official site