In 1954, Pat Cooper owned 51% of the newly-formed East Preston-Epping Bus Service, in partnership with the existing operators of Reservoir Motors.

[2][3] The Cooper family continued to manage both Reservoir Bus Company and Midland Tours.

In August 1980, Reservoir Bus Company formed a joint venture with Dysons, the East West Bus Company, to operate routes that serviced both Reservoir and Dysons operating areas, such as route 560 between Broadmeadows station and Greensborough.

[6] In November 2012, the Dyson Group purchased Reservoir Bus Company, including the Midland Tours brand.

The Cooper family sold its 50% share of East West Bus Company to Dysons in February 2014.