Berkeley's first production car was the 'Sports' (type SA322), announced in September 1956 and produced from October 1956 to January 1957. Production began with two prototypes (registered RMJ395 and RMJ946), which were seen being tested with enthusiasm around the neighbourhood of Biggleswade in the late summer of 1956. Stirling Moss drove one at Goodwood in September, and the car was launched to the public at the 1956 London Motor Show – one year ahead of the Lotus Elite, which was also to be of fibreglass monocoque construction.