IIRC the Lotus 24 has been owned for several years now by Roy Walzer, run by Eclipse Motorsport and driven by Phil Keen at Mallory on Wednesday, and elsewhere.. I was told that it has been several Goodwood Revivals and had some very good results there. Either frp/Andy or John Ginger seemed to know one of the Eclipse guys (a South African?) so maybe they can find out more about the car?
(I can confirm the chassis plate read #944).
Yes, Tony, I used to know the Eclipse guys, but Wednesday was my first contact with them for seven years. I don't think they would be able to help much, though: they're just 'freelancing' with the car and are not really 'historic' types. In fact, when I asked Steve about the car, he admitted not having a clue but had been told by someone that it was the '61 USGP winner. I think it was because I told him that wasn't possible if it was a 24, and what the colour suggested, that he tried to help by texting someone who confirmed it was a UDT-Laystall car. But, as we know, 944 originally had BRM power and, as Cyril's photo shows, this car has a Climax. Steve also said the car is now owned by Mike McInerney (at least, I think that's what he said).
The car appears to have done the Monaco Historic, as well as Goodwood, so entry lists / results from those events should shed more light.
(I bet there are several dozen people reading this who know all the history of this car and are aghast at my ignorance!)