AC Cars (of Thames Ditton) built railbus SC 79979. It was delivered in February 1958 and spent some time in the south doing trials and demonstration trips before being dispatched to its intended home in Scotland in August. It returned south briefly early in 1959 for modifications. Given that it is pictured on the down main at Lapworth, it is probable that it is en route between the London area and Scotland, either in August 1958 or February/March 1959.
Caption courtesy of David Woodcock. Grateful thanks.
[Mike Morant collection]