London Buses is the subsidiary of Transport for London (TfL) that manages bus services within Greater London. Buses are required to carry similar red colour schemes and conform to the same fare scheme. All services are provided by private sector operators.
London Bus Operators:[]
London United (Owned by R.A.T.P.)
Former London Bus Operators:[]
First London buses
[1]The website is [2] and the Wikipedia page is [3]