§ The administrative counties of London and Middlesex;
§ so much of Essex as consists of the boroughs of Barking, Chingford, Dagenham, East Ham, Ilford, Leyton, Walthamstow, Wanstead and Woodford, and West Ham; and the urban districts of Chigwell and Waltham Holy Cross;
§ so much of Hertfordshire as consists of the urban districts of Barnet, Bushey, Cheshunt, and East Barnet; and the rural district of Elstree;
§ so much of Kent as consists of the boroughs of Beckenham, Bexley, Bromley, and Erith; and the urban districts of Chislehurst and Sidcup, Crayford, Orpington, and Penge; and
§ so much of Surrey as consists of the boroughs of Barnes, Beddington and Walling-ton, Croydon, Epsom and Ewell, Kingston-upon-Thames, Maiden and Coombe, Mitcham, Richmond, Surbiton, Sutton and Cheam, and Wimbledon; and the urban districts of Banstead, Carshalton, Coulsdon and Purley, Esher, and Merton and Morden