List of current bus operators of the United Kingdom

This is a list of current bus and coach operators of the United Kingdom, including public transport, private hire and tour operators.
Large groups.
Most bus services in the United Kingdom are run by the Big Five, five large groups of companies which emerged in the 1990s from the consolidation of bus companies privatised in the 1980s. These groups are all focused on transport. Some of them also run rail services, express coach services and overseas transport companies.
They are:
Foreign-owned groups.
A number of large foreign companies have entered the UK bus market. Their UK bus operations are not yet large, but they are growing.
Municipal operators.
For a list of the remaining local-government owned bus companies see Municipal bus companies.
London.
In London, a variety of companies run buses under contract to London Buses. They are:
Northern Ireland.
In Northern Ireland most bus services are operated by government-owned Translink through their subsidiaries:
Some cross-border services are operated by Bus Éireann.
Express coaches.
UK express coach operators include: