In 1937, a house and garage were built on Station Road, which was the base of the firm until it ceased to operate buses.

While it provided no evidence, Felix decided they couldn't afford to fight any court case, so as a result all cat images were removed from every aspect of the company.

This transfer took place on 29 January 2012, the bus services then operating from Trentbarton's Meadow Road garage in Derby, as a separate unit.

Felix continued to operate some school journeys into Kirk Hallam until the end of March 2012, when subsidies were withdrawn by Derbyshire County Council.

After bus deregulation in 1986, the fleet increased gradually to around twice its previous size, peaking at 17 vehicles in 2002, reducing to 16 in 2005, and effectively being 15 from February 2007 due to an engine problem with a 1988 Leyland Lynx.

The final fleet contained three coaches, two Irisbuses and a Volvo, and 90% of the service buses were low-floor, easy access types.

The main service was latterly operated jointly with Trentbarton as "The Black Cat" having previously been numbered 12.

By 1950, the livery was red and maroon with gold fleetnames and black Felix the Cat cartoon emblems.

In the mid-1990s, in common with many operators, Felix coaches (not buses) appeared in white with vinyl relief patterns.

The final vehicle to carry the red and maroon livery, Leyland Lynx J564 URW, suffered engine failure in February 2010 and was withdrawn.