I found this interesting blurb. Looks like Ecclestone sold it a year later in new condition:
Finished in December 1955 and dispatched to Jaguar-Rover dealership Henlys of Manchester, XKD 518 was sold to
Bernie Ecclestone. Indeed, that Bernie who got a taster for motorsports in the late 1940s, and who became the top dog in F1 as the years passed, only to be let off from his position as chief exec of the Formula 1 Group by Liberty Media.
A year later, British racing driver Peter Blond saw the car, fell in love with it, and convinced Ecclestone to sell it to him. Blond remembers that Bernie had a small office on Warren Street,
“a sort of box with a secretary in it. It was already registered KDB 100 when I bought it. It was brand new and was offered to me for £3,500, which was not a bad price as Brian Naylor in Stockport was offering one for £3,750 at about the same time.”Click to expand...