A1

Conurbation with population 50,000 <200,000 within conurbation

A2

Conurbation with population <50,000 within conurbation

A3

Conurbation with population 100,000 <200,000 outside conurbation

A4

Conurbation with population 50,000 <100,000 outside conurbation

A5

Conurbation with population <50,000 outside conurbation

A7

Conurbation with population 200,000 + within conurbation

A8

Conurbation with population 200,000 + outside conurbation

B1

Metropolitan Borough with population 50,000 <200,000 within conurbation

B2

Metropolitan Borough with population <50,000 within conurbation

B3

Metropolitan Borough with population 100,000 <200,000 outside conurbation

B4

Metropolitan Borough with population 50,000 <100,000 outside conurbation

B5

Metropolitan Borough with population <50,000 outside conurbation

C1

Urban District with population 50,000 <200,000 within conurbation

C2

Urban District with population <50,000 within conurbation

C3

Urban District with population 100,000 <200,000 outside conurbation

C4

Urban District with population 50,000 <100,000 outside conurbation

C5

Urban District with population <50,000 outside conurbation

D1

London borough with population <200,000

D7

London borough with population 200,000 +

E2

Rural District within conurbation

E6

Rural District outside conurbation

F2

City of London (within conurbation)