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 "Morris Minor"): Designed under the leadership of Alec Issigonis, more than 1.3 million were manufactured between 1948 and 1972 in three series: the MM (1948 to 1953), the Series II (1952 to 1956) and finally the 1000 series (1956 to 1971).
Relevant evidence: No