 The Titan continued to be the favoured double deck chassis until the end of BETs interest in the company.Oil engines were favoured and bodywork provided by a number of different coachbuilders, although Park Royal provided the majority of bus bodies, a relationship which continued into the NBC period.Southdown benefited from the establishment of the London Passenger Transport Board in 1933, gaining services previously operated by "East Surrey" and "Autocar" in the Weald south of East Grinstead and Crawley.