Any tramway, light railway or trolley vehicle undertaking owned or worked by the following undertakers, being local authorities:—
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.