An advert in "Horseless vehicles" (1900) mentions Penningtons armoured car and which got me curious and after several false starts a search of the EPO turned up this:
GB 189622610 (A) Improvements in or relating to Machine Guns, their Carriages, and Appurtenances.
I am located on the Continent, so I don't know what EPO means, sorry.
the European Patent Organisation (or The European Patent Office - The European Patent Office (EPO) is the executive arm of the European Patent Organisation.)