WCity Sightseeing is an open-top, sightseeing tour bus operator. It provides tour bus services in more than 130 cities around the world. As City Sightseeing has grown and expanded, the company now also provides boat tours, sightseeing train tours, and guided walking tours.
WBig Bus Tours, is the largest operator of open top bus sightseeing tours founded in May 2011 after "Les Cars Rouges" and the "Big Bus Company" merged. The company operates in 20 cities of 11 countries with more than 150 buses around the world. The United States is the country with the largest number of cities with Big Bus Tours service. Typically, Big Bus Tours use open top double-decker buses in burgundy and cream-coloured livery.
WThe Sydney Explorer was an Australian open top bus tourist sightseeing service operating in the Sydney central business district and Eastern Suburbs. Nowadays the company is owned by Big Bus Tours and trades as Big Bus Sydney.
WEnsignbus is a bus and coach operator and bus dealer based in Purfleet, Essex.
WGray Line Worldwide is an international sightseeing company which claims to be the largest of its kind in the world. The company was founded in 1910 and operates worldwide through independent operators it calls "licensees" with a presence in most of the world's most popular sightseeing destinations. Gray Line does not provide sightseeing services directly, but rather provides its brand, promotional services and booking systems to licensees. Gray Line is also the largest direct supplier of destination services to online travel sellers, wholesalers and travel agents.
WLothian Buses is the largest municipal bus company in the United Kingdom. the City of Edinburgh Council owns 91%, Midlothian Council 5%, East Lothian Council 3% and West Lothian Council 1%.
WTootbus London, formerly the The Original Tour is a London bus tour operator using open-top double-decker buses. It also holds the franchise to run City Sightseeing's London tour. Based in Wandsworth, it is a subsidiary of RATP Dev.
WTootbus, formerly Bath Bus Company is an English open top bus operator operating in Bath and Cardiff. It is a subsidiary of the RATP Group.