That's about the ugliest homebuilt racer I've ever seen, like a shrunken Swandean Special. Still, the important thing is that the builder and/or driver enjoyed themselves.
Very high seating position, suggesting that it's based on a production car. Assuming it's in the same class as the Lotus Mk9, I'm guessing it might be MG-based. Is it?
(Sorry, I just reread your OP, and you probably don't know. Is it 1250cc ?)