It's the 1970 World Cup Rally Trident Venturer.
The rally ran from London to Mexico for the Rally but despite a good start the Trident, driven by a British Army team, didn't get ay further than Yugoslavia, hitting a big stone which damaged the suspension.
The car languished in various places until it was restored a couple of years ago and is no back to its Rally specification.
Here's a picture of it taken at a Trident Car Club gathering in 2016. You can see my TVR Trident there in the picture - rear view.