| ENGLAND, Greater London |
| |
Weiter auf Central London |
| |
Beginn der Autobahn |
| (1) |
Central London, Hammersmith |
| (2) |
Chiswick, Staines-upon-Thames, Hounslow, North Circular Road
South Circular Road |
| | |
Heston |
| (3) |
Feltham, Hayes, Hounslow, Heathrow T4 & Cargo |
| (4) |
Hayes, Uxbridge, Heathrow T1, 2 & 3 |
| (4B) |
Heathrow T4 & Cargo, Watford, Birmingham
Gatwick, Winchester () |
| Berkshire |
| (5) |
Langley, Staines, Eton B470 |
| (6) |
Slough, Windsor |
| Buckinghamshire |
| (7) |
Slough |
| |
Themse |
| Berkshire |
| (8/9) |
High Wycombe, Henley-on-Thames, Maidenhead
|
| (10) |
Reading, Wokingham, Bracknell |
| (11) |
Reading, Basingstoke B3270 |
| | |
Reading |
| (12) |
Theale, Reading |
| (13) |
Newbury, Oxford |
| | |
Chieveley (neben der vorherigen Anschlussstelle) |
| (14) |
Hungerford, Wantage |
| | |
Membury |
| Wiltshire |
| (15) |
Marlborough, Swindon, Oxford |
| (16) |
Swindon, Royal Wootton Bassett, RAF Lyneham,
Calne B4005 |
| (17) |
Cirencester, Chippenham B4122 |
| | |
Leigh Delamere |
| Gloucestershire |
| (18) |
Bath, Stroud |
| (19) |
Bristol |
| (20) |
The MIDLANDS, The SOUTH WEST,
Gloucester, Bristol |
| (21) |
Chepstow (ABG London) |
| (22) |
The SOUTH WEST, Avonmouth |
| |
Prince of Wales Bridge (Severn) 5.128 m |
| WALES, Monmouthshire |
| |
Mautstelle (nur Richtung Swansea) |
| (23) |
Chepstow (ABG Swansea) |
| (23A) |
Magor B4245 |
| | |
Magor (neben der Anschlussstelle) |
| (24) |
The MIDLANDS, Monmouth,
Newport B4237 |
| (25) |
Caerleon B4596 |
| (25A) |
Newport, Cwmbran |
| |
Brynglas Tunnel 362 m |
| (26) |
Cwmbran, Newport, Caerleon |
| (27) |
High Cross B4591 |
| (28) |
Cwmbran, Newport, Caerleon |
| (29) |
Cardiff (ABG London) |
| Glamorgan |
| (30) |
Cardiff |
| | |
Cardiff Gate (neben der Anschlussstelle) |
| (32) |
Cardiff, Merthyr Tydfil |
| (33) |
Cardiff, Cardiff Airport, Barry, Penarth |
| | |
Cardiff West (neben der Anschlussstelle) |
| (34) |
Llantrisant, Rhondda |
| (35) |
Bridgend, Pencoed |
| (36) |
Bridgend, Maesteg |
| | |
Sarn Park (neben der Anschlussstelle) |
| (37) |
Pyle, Porthcawl |
| (38) |
Port Talbot (Keine Ausfahrt Ri. London) |
| (39) |
Port Talbot (Ausfahrt Ri. London) |
| (40) |
Port Talbot |
| (41) |
Port Talbot B4286 (TAS Swansea) |
| (41) |
Briton Ferry (HAS London) |
| |
Neath |
| (42) |
Swansea (HAS London) |
| (42) |
Briton Ferry, Swansea (HAS Swansea) |
| (43) |
Neath, Merthyr Tydfil B4290 |
| (44) |
Swansea B4291 |
| (45) |
Swansea, Pontardawe B4603 |
| (46) |
Llangyfelach, Felindre B4489 |
| (47) |
Swansea |
| | |
Swansea (neben der Anschlussstelle) |
| |
Loughor |
| Carmarthenshire |
| (48) |
Pontarddulais, Llanelli |
| (49) |
Llandeilo |
| | |
Pont Abraham (neben dem Kreisverkehr) |
| |
Ende der Autobahn |
| |
Weiter auf Carmarthen |