Question: What is the name of the British car that debuted at the Earls Court Motor Show, London, on 20 September 1948, from which the floorpan, suspension and steering were utilised for the Riley One-Point-Five?
Sentence (from "Austin A90 Atlantic"): The Austin A90 Atlantic is a British car that was produced by the Austin Motor Company from 1949 to 1952.
Relevant evidence: No