Operators

Megabus.com
Bus and coach company operating throughout the UK and in the United States midwest region. Provides routes, schedules and online booking. Based in Scotland.
http://www.megabus.com/

Stagecoach Group
Bus operator, with aviation and rail interests . Operate services in a number of countries including the United Kingdom, United States, and China.
http://www.stagecoachgroup.com/