I think it is called Fanny
The 1600cc Ford 'Kent' crossflow fitted under the bonnet with just a small 'bulge' behind the LH headlight to allow space for the alternator The grille came from the 'kit' manufacturer, although as the body was built from marine ply, 'kit' is a rather grand term! A set of paper patterns was used to cut the parts. A fibreglass dash top (visible behind the windscreen) provided some compound curves. The radiator was a triple core item originally intended for an Austin Maxi - very efficient, although an array of different hoses and odd bits of pipe were required to match up the plumbing.
Aha - you've found it!
You still haven't answered the 'when' and 'by whom' questions though so I'll have to lock it for you to do so.
The car was originaly a JC Midge but I don't think you can tell that! JC Midges were Triumph Herald-based but this doesn't have any Triumph parts.
In addition to the Ford Kent engine it also has M3/4 Ford Cortina suspension, an Escort exhaust and fuel tank and many other Ford bits and pieces. The builder intended the car to look old and sourced many parts at the Beaulieu Autojumble as well as at B&Q (a UK DIY chain).
How it could ever look old with those hubcaps though I'm not quite sure..
Awaiting the final answers before I can move this one to Solved.