Here are a couple of experimental Rolls-Royce's at the Derby factory.
The first is RC2406 (#31EX) Park Ward Limousine, scrapped after an accident in 1935.
Then there is RC2545 (#32EX) Phantom III Park Ward Saloon, currently located in Australia with same owner since 1965.
In the back #30EX, the first Phantom III (codename Spectre) Park Ward Limousine, scrapped in 1939.
Thanks boybentley for sharing.