Despite bidding for a number of other larger bus operators in the intervening period, the first major acquisition was Brighton & Hove Bus and Coach Company in November 1993, which was quickly followed by the Oxford Bus Company in March 1994. The privatisation of London Buses in the mid-nineties saw Camberwell-based London Central acquired in November 1994, and this purchase was built upon in June 1996, when fellow London bus operator London General was acquired from the management and employee team that acquired the business at privatisation.
In December 2005 the group purchased The Birmingham Coach Company, which operates express coach contracts on behalf of National Express and local bus services in the West Midlands under the Diamond Bus name. The group had been known for some time to be keen to begin operating in the area. On 22 February 2006 Go-Ahead purchased another operator in the West Midlands, Probus Management Limited, trading as People's Express, for £2.4m, adding around 100 vehicles to its West Midlands operations. In August 2006 the Birmingham Coach Company (trading as Diamond Bus) and Probus operations were regrouped under the Go West Midlands Limited legal entity, with the bus operations branded as Diamond in the West Midlands.
On March 3 2008, Go-Ahead sold Go West Midlands to Rotala's Central Connect, just after two years after purchasing the company. This was after a review following the group's interim results published on February 15 2008.
On 30 November 2005, the UK Secretary of State for Transport, Alistair Darling, announced that Govia had been successful in winning the Integrated Kent Franchise, and took over on April 1 2006. The franchise continues to use the previous Southeastern branding, but the bid was mounted using the name London & South Eastern Railway.
More recently, in November 2007 Govia began operating the new London Midland franchise. This includes part of the previous Central Trains and Silverlink County franchises.
Keith Ludeman was appointed as Chief Executive on 10 July 2006 following the resignation of Chris Moyes due to an undisclosed serious illness, subsequently revealed to have been a brain tumour.
All of these are larger groups with operations in more than one country. The main distinguishing features of the Go-Ahead Group are the relatively high degree of autonomy the group offers its individual operating companies, and its focus on investing in local management. These tactics are thought to have helped two of the group's bus operating companies, in Oxford and Brighton, to gain a reputation as among the best in the UK outside London.