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The international territorial level (ITL) is a geocode standard for referencing the subdivisions of the United Kingdom for statistical purposes. In England, the Participation Survey covers:

• ITL 1: there are 9 regions, for example, North West England, or London.
• ITL 2: there are 33 regions, for example, East Yorkshire and Northern Lincolnshire, or Outer London – East and North East

International territorial level 1 (ITL 1)

Figure 1 shows the boundaries of the nine ITL 1 regions of England that the Participation Survey covers. There are 33 ITL 2 regions.

Figure 1: Map of England labelled with the nine ITL 1 regions, and Table 1 gives the names of those regions.

Table 1: The names of the ITL 1 regions that correspond to the numbers on the map in Figure 1.

Number	ITL 1 region	Code
1	North East England	TLC
2	North West England	TLD
3	Yorkshire and The Humber	TLE
4	East Midlands	TLF
5	West Midlands	TLG
6	East of England	TLH
7	London	TLI
8	South East	TLJ
9	South West	TLK

International territorial level 2 (ITL 2)

Figure 2 shows the boundaries of the 33 ITL 2 regions of England that the Participation Survey covers, where the regions inside London (LDN) are magnified in Figure 3. There are nine ITL 1 regions.

Figure 2: Map of England labelled with the 33 ITL 2 regions, and Table 2 gives the names of those regions. London (LDN) has five ITL 2 regions.

The ITL 2 regions within London

Figure 3: Map of the five ITL 2 regions within London, and rows 21 to 25 in Table 2 gives the names of those regions. There are 33 ITL 2 regions.

Table 2: The names of the ITL 2 regions that correspond to the numbers on the maps in Figures 2 and Figure 3.

Number	ITL 2 region	Code
1	Tees Valley and Durham	TLC1
2	Northumberland, and Tyne and Wear	TLC2
3	Cumbria	TLD1
4	Greater Manchester	TLD3
5	Lancashire	TLD4
6	Cheshire	TLD6
7	Merseyside	TLD7
8	East Yorkshire and Northern Lincolnshire	TLE1
9	North Yorkshire	TLE2
10	South Yorkshire	TLE3
11	West Yorkshire	TLE4
12	Derbyshire and Nottinghamshire	TLF1
13	Leicestershire, Rutland, and Northamptonshire	TLF2
14	Lincolnshire	TLF3
15	Herefordshire, Worcestershire, and Warwickshire	TLG1
16	Shropshire and Staffordshire	TLG2
17	West Midlands	TLG3
18	East Anglia	TLH1
19	Bedfordshire and Hertfordshire	TLH2
20	Essex	TLH3
21	Inner London – West	TLI3
22	Inner London – East	TLI4
23	Outer London – East and North East	TLI5
24	Outer London – South	TLI6
25	Outer London – West and North West	TLI7
26	Berkshire, Buckinghamshire, and Oxfordshire	TLJ1
27	Surrey, East and West Sussex	TLJ2
28	Hampshire and Isle of Wight	TLJ3
29	Kent	TLJ4
30	Gloucestershire, Wiltshire, and Bath-Bristol area	TLK1
31	Dorset and Somerset	TLK2
32	Cornwall and Isles of Scilly	TLK3
33	Devon	TLK4