The NECC was acquired, with all its subsidiary businesses, by British Electric Traction Company (BET) in 1928.
[1] In the late 19th and early 20th centuries, the BET was a major operator of tramways in the UK, and later became one of the biggest operators of motor buses in the UK.
The Rhondda Tramways Company was given the franchise under act of parliament to run trams within the boundaries of the Rhondda Urban District Council.
Western Welsh was merged with Red & White to form National Welsh, a component company of the newly created and nationalised National Bus Company (NBC).
National Welsh was sold to its management and began a vigorous expansionist drive, taking over smaller local and municipal bus companies in the South Wales valleys.