OK Paul, I defer to your personal knowledge . . . . . but . . . . is it possible yours was a Swift!!
I now have it on good authority that Larry’s chassis is a Swift, manufactured by Doug Sheppard in the UK.
The only Swift I was aware of was one that was very similar to the Anderson AK (or perhaps the other way round), but my informant assures me that he used to race one of these A-frame versions and also sold a few along the way to local racers in the South-West of the UK.