Do you have a copy of that issue?
My source says:
QUOTE
This three-wheeler has an intriguing story. An advert for the so-called ******* appeared in Motorcyle Mechanics magazine in April 1960, the publishers having built a car in a series of features at a reputed all-in cost of £150. ***** had some experience with three-wheeled invalid carriage bodyshells, but this trike was somewhat different, being arrived at by simply reversing a Hamblin Cadet bodyshell, with the nose now forming the tail! There was claimed to be room for two adults and a child in the cockpit, which was protected by a Ford windscreen (a hardtop was mooted as an optional extra). The tubular steel chassis was made by Buckler and a Velocette 500cc motorcyle engine was fitted. At least one prototype was built, and the intention was to market complete kits for home builders - the chassis was to have cost £85 - but this plan seems never to have transpired.
UNQUOTE
The ***** doesn't say Triton, but if you have a copy of the issue in question and the story above tallies exactly but with Triton Mk1 as the *****s then my source must be wrong!
Any idea at all what else the ****s might represent?