The West Midlands Passenger Transport Executive, operators of the vehicles and routes taken over by the West Midlands Passenger Transport Authority from the Corporations of Birmingham, Walsall, West Bromwich and Wolverhampton, commenced operation on October 1st 1969 and all of the vehicles transferred had their legal owners transfers covered with Fablon sheets printed with the PTE's details, and the various coats of arms similarly covered by the "West Midlands" name with the exception of Walsall's trolleybuses, where the crest was covered by a blank sheet. The last buses to be delivered to Birmingham City Transport and in full livery were Daimler Fleetlines 3781-3880 (NOV 781-880G) but the first fifteen of the next batch were in BCT livery and the first two of them, 3881/2, also wrongly carried the coats of arms.
The planned creation of a County of West Midlands in 1974 brought garages and routes wholly within the county and vehicles to operate them operated by Midland Red under the WMPTE control on December 3rd 1973, and the operations of Coventry Corporation Transport similarly on April 1st 1974.
Vehicle interchanges across the enlarged fleet saw, for instance, open-platform ex Birmingham buses running on former Midland Red routes in the Black Country, where passengers had previously had the luxury of heaters and platform doors; and former West Bromwich and Coventry buses working Birmingham's Outer Circle, the last route to remain wholly two-man (driver and conductor) operated. Overall, the public were not impressed and as standards of cleanliness and maintenance declined the level of complaints rose to and all time high.