Complex sentence: In 1949 it became part of Associated Commercial Vehicles Ltd., that included AEC (the chassis manufacturer), and this formidible combination of AEC and PRV supported the demanding requirements of London Transport and many other major fleet owners and operators.
Split into simpler sentences: In 1949 it became part of Associated Commercial Vehicles Ltd., which included AEC (the chassis manufacturer). This formidible combination of AEC and PRV supported the demanding requirements of London Transport and many other major fleet owners and operators.