There was a time when one of the E-type ERAs was converted to a Jaguar-powered two-seater. I can't find a photo of it but I think that this is it.
According to DSJ (who else) Directory (1987) E type ERA GP1
"caught fire in Isle of Man race in 1950. The remains were made into a Jaguar-engined sports car. Resurrected as GP1 in recent years"
I guessed it might be yourself who solved this - Allan gets the coconut! It's ERA E-type GP1, or what remained of it, which Ken Flint and Verdun Edwards converted into a 2-seater sports car with a Jaguar 3.4-litre engine. The ERA engine ended up with Rob Walker, who fitted it to his pre-war Delage GP car. According to my information, this sports car was built in 1955, which seems a long time after the fire.
Quite naturally the "original" E-type was resurrected as the boom in Historic Racing (and values) intensified. I don't know what Jenks would think of it all - money didn't mean much to him. I think Rob Walker's Delage was destroyed in that terrible fire at his garage, but I'm not sure.
Well done!