Riley and Wolseley take over the Morris Minor floorpan. Alec Issigonis laid down the basic design of what was going to be the replacement Morris Minor and used the Minor floorpan and mechanics. But the Minor was selling very well, and the new car was too heavy and too expensive. After Issigonis had left (temporarily) to work for Alvis, Gerald Palmer was called into transform it, and a 1489cc B-series engine was slotted into it. The Wolseley 1500 was announced first in 1957, and then in November 1957 the Riley One-Point-Five was annnounced with a tuned 62bhp version of the same engine. A Mark II version of these cars was announced in May 1960 with few changes except for hidden bonnet and boot hinges. In 1961 the MkIII cars were introduced with larger tail lights from the Austin A40 grafted onto the rear corners, and new wider grilles and round side lights. These cars were discontinued in 1965 although the Australians carried on with longer Austin and Morris-badged derivatives.