It's a Bristol something
Exactly what I was initially going to say!
I think it is actually a Aviation Traders ATL-98 Carvair, a conversion of the DC-4 by Freddie Laker and his company, Freddie Laker's Aviation Traders (Engineering) Limited, to replace the aging, small-payload Bristol Freighter. They do look alike, but the Carvair could carry more cars than the Bristol Freighter (they were real "car-go" aircraft

)