The following is a list of the transport undertakings transferred to the London Passenger Transport Board under the terms of the London Passenger Transport Act 1933. The transfer took a number of months as agreement had to be reached between the various operators and the board.

1 July 1933

• Undertakings owned by the Underground Group:
  • The London Electric Railway Company
  • The Metropolitan District Railway Company
  • The Central London Railway Company
  • The City & South London Railway Company
  • The Lots Road Power House Joint Committee
  • The London General Omnibus Company, Limited
  • London General Country Services, Limited
  • Overground, Limited
  • The Tramways (M.E.T.) Omnibus Company, Limited
  • The Metropolitan Electric Tramways, Limited
  • The London United Tramways, Limited
  • The Union Surplus Lands Company, Limited
  • The Union Construction and Finance Company, Limited
  • Morden Station Garage, Limited
  • Acme Pullman Services, Limited
  • Bucks Expresses (Watford), Limited
  • Green Line Coaches, Limited.
  • Skylark Motor Coach Company, Limited
  • South Metropolitan Electric Tramways and Lighting Company, Limited (tramway and light railway undertaking only)
• The Metropolitan Railway Company, (excluding the undertaking of the Surplus Lands Committee)
• The following local authorities' tramway, light railway or trolley vehicle undertakings:
  • The mayor, aldermen and burgesses of the borough of Barking
  • The Bexley Urban District Council
  • The mayor, aldermen and burgesses of the County Borough of Croydon
  • The mayor and commonalty and citizens of the City of London
  • The Dartford Urban District Council
  • The mayor, aldermen and burgesses of the County Borough of East Ham
  • The Erith Urban District Council
  • The Hertfordshire County Council
  • The mayor, aldermen and burgesses of the borough of Ilford
  • The mayor, aldermen and burgesses of the borough of Leyton
  • The London County Council
  • The Middlesex County Council
  • The mayor, aldermen and burgesses of the borough of Walthamstow
  • The mayor, aldermen and burgesses of the County Borough of West Ham
• Thomas Tilling, Limited
• Tilling and British Automobile Traction Company Limited^[1][2]

1 October 1933

• Thomas Tilling Limited^[3]
• Lewis Omnibus Company Limited^[4]

31 October 1933

• Cardinal Omnibus Company, Limited
• Chariot Omnibus Services, Limited
• Filkins & Ainsworth, Limited.
• Glen Omnibus Company (London), Limited
• F. W. Hayes
• F. J. C. Kirk.
• Nelson Omnibus Company, Limited
• A. H. Raper
• Ryan Omnibus Company
• F. Steer
• Supreme Motor Omnibus Company, Limited
• United Omnibus Company, Limited^[5]

9 November 1933

• Convey and Clayton
• Eagle Omnibus Company, Limited
• Essex Omnibus Company, Limited
• E. G. Hope
• A. Mills
• C. H. Pickup
• Pro Bono Publico, Limited
• Renown Traction Company, Limited
• Charles Russett and Son^[6]

23 November 1933

• Amersham and District Motor Bus and Haulage Company, Limited
• Earl Motor Omnibus Company, Limited
• E. Puttergill, Limited
• F. A. Rasey
• A. G. Summerskill, Limited
• Triumph Motor Omnibus Company
• Woolvett and Carswell^[7]

4 December 1933

• G. H. Allitt and Sons, Limited
• E. Brickwood, Limited
• Cleveland Omnibus Company, Limited
• Enterprise Transport Company, Limited
• Holliday and Bangs
• Peraeque Transport Company, Limited
• Pioneer Omnibus Company^[8]

14 December 1933

• B.B.P. Omnibus Company, Limited
• Gordon Omnibus Company, Limited
• Powell and Whybrow^[9]

20 December 1933

• Premier Omnibus Company, Limited
• Premier Line, Limited^[10]

1 February 1934

• Empress Motors, Limited^[11]

14 February 1934

• Red Rover Omnibus, Limited^[12]

21 February 1934

• Birch Brothers, Limited^[13]

13 June 1934

• Paterson Omnibus Company, Limited^[14]

11 July 1934

• Westminster Omnibus Company, Limited^[15]

18 July 1934

• St. George Omnibus Company, Limited^[16]

10 August 1934

• Chocolate Express Omnibus Company, Limited^[17]

29 August 1934

• Ambassador Bus Company, Limited
• Sphere Omnibus Company, Limited
• Miller Traction Company, Limited
• Perkins Omnibus Company, Limited^[18]

7 November 1934

• City Motor Omnibus Company, Limited
• Reliance Omnibus Company, Limited
• Victory Omnibus Company, Limited^[19]

5 December 1934

• Prince Omnibus Company, Limited^[20]