| Centres |
Codes |
| BRENTWOOD |
X079 |
| BURNLEY |
B378 |
| BURTON-UPON-TRENT |
B386 |
| CANTERBURY |
C021 |
| CHESTERFIELD |
C110 |
| CREWE |
C226 |
| COLCHESTER |
C17X |
| DOVER |
D087 |
| GRANTHAM |
G051 |
| GRAVESEND |
G06X |
| GRIMSBY |
G086 |
| IPSWICH |
J032 |
| LEEDS |
L043 |
| MAIDSTONE |
M023 |
| NOTTINGHAM |
N097 |
| OXFORD |
U037 |
| PRESTON |
P111 |
| SITTINGBOURNE |
S387 |
| STAMFORD |
S212 |
| STOCKPORT |
S247 |
| STRATFORD-UPON-AVON |
S298 |
| SWINDON |
S344 |
| THANET |
T065 |
| WELLS |
W03X |
|
| Centres |
Codes |
| ASHFORD |
A088 |
| BANBURY |
B017 |
| BISHOP'S STORTFORD |
B173 |
| BRENTWOOD |
X079 |
| BURTON-UPON-TRENT |
B386 |
| BUXTON |
B416 |
| CHIPPENHAM |
C250 |
| COLCHESTER |
C17X |
| CREWE |
C226 |
| FOLKESTONE |
F047 |
| GRAVESEND |
G06X |
| LEEDS |
L043 |
| LEICESTER |
L051 |
| LINCOLN |
L06X |
| LOUTH |
L140 |
| MANCHESTER |
M04X |
| NEWARK |
N097 |
| NOTTINGHAM |
N097 |
| PETERBOROUGH |
P049 |
| PRESTON |
P111 |
| READING |
R116 |
| SEVENOAKS |
S085 |
| THANET |
T065 |
| TROWBRIDGE |
T111 |
|
| Centres |
Codes |
| BISHOP'S STORTFORD |
B173 |
| BOSTON |
B254 |
| BURTON-UPON-TRENT |
B386 |
| CREWE |
C226 |
| DOVER |
D087 |
| GRAVESEND |
G06X |
| NOTTINGHAM |
N097 |
| OXFORD |
U037 |
| SHREWSBURY |
S115 |
| THANET |
T065 |
|
