allowed to operate buses in liveries other than standard red, meaning that for the first time it was possible for non-red buses to run into the centre of London, such as those on high-profile route 24 operated by Grey-Green. The only requirement was to display the London Transport roundel on the bus, to designate a London Transport tendered service. Ironically, several of the new private entrants were descendants of London Transport's former 'green' buses division, which operated outer London services that were passed to the National Bus Company's control as London Country Bus Services, in 1969. The private competition was not without controversy, with objections to non-red buses leading to an edict in 1997 specifying 80% red liveries. The tendering also caused problems with several operators needing to hire buses due to late delivery of new buses for newly won routes. One such controversial route was the arrangements for tendering route 60 which was initially awarded to Capital Logistics. Difficulties in setting up the route eventually saw operation by eight different operators and 10 different bus types in a short space of time, before the route finally gained a stable arrangement. The collapse of Harris Bus in December 1999, led to London Transport forming East Thames Buses as an arm's-length company to provide temporary operation of the routes. It was retained by the new Transport for London authority, to tender for routes itself until sold in October 2009 to the Go-Ahead Group. Break-up of London Buses On 1 April 1989 London Buses was divided into 12 business units, in preparation for sell-off. The companies were created along geographic lines, with all but Westlink having routes running into Central London. The division names and a small graphic device were added to the buses, in white. An exception to this was the Westlink unit, which received a new livery altogether. Some of the names chosen were drawn from the pre London Transport era, namely London General Omnibus Company and London United Tramways. The separate business units created were: Unlike the other units, Centrewest quickly branded its buses into separate groups, in the main removing the London Buses roundel in favour of various gold designs, with just the central services remaining in a slightly altered roundel based scheme. The group brands were: Challenger, Ealing Buses, Gold Arrow, Uxbridge Buses, Hillingdon local service and Orpington Buses. Intermediate operation During this time of separate business