The Passenger Transport Executive (PTE) bus operations were the bus operating divisions of the passenger transport executives in the United Kingdom. In 1986 they underwent a process of deregulation and privatisation, forming some of the largest private bus companies in the UK outside London, with all being sold to their employees or management. Despite their relative size and lucrative operating areas, none of the companies survived beyond the late 1990s, with all falling into the hands of the major bus groups, who had their origins in privatised regional subsidiaries of the former National Bus Company and the Scottish Bus Group.