Who built this and when? And there's also a nickname of this vehicle. So there is a chance for a nice point
Experts?
looks very similar to the VSCC regular 'Thunderbug'
not that
JAP engine?
no. In fact it had two different engines during its life
Professionals?
Busy Bee Three Wheeler Wood-Alloy by J.A. Mills 1919 UK
You are right
This Busy Bee is unique and was built by Mr J A Mills of Mansfield in 1919 for a total cost of £120; he then proceeded to use it as his daily transport for the rest of his life and covered over 100,000 miles. It was originally powered by a 4.5hp Stag engine but this was replaced by a 6hp AJS V-twin in 1928 and which is still used today. Drive is by chain to a mid-mounted Sturmey-Archer clutch and three-speed gearbox and thence by another chain to the single rear wheel. The frame is tubular steel and just ten bolts secure the three-piece plywood body to it. It is really a very small piece of automotive history.