Road |
From |
To |
Notes |
A400 road |
Central London
(Trafalgar Square) |
Archway |
Takes the route of the Northern line, Charing Cross Branch and Barnet Branch |
A401 road |
Central London
(Piccadilly Circus) |
Angel |
Along Shaftesbury Avenue, Bloomsbury Way, Theobald's Road, Rosebery Avenue and the northernmost part of St John Street |
A402 road |
Central London
(Marble Arch) |
Stamford Brook, Chiswick |
Includes sections of the original A40 along Bayswater Road, Notting Hill Gate and Holland Park Avenue, the E/W carriageways of Shepherds Bush Green and Goldhawk Road |
A403 road |
M48 motorway,
J1 near Aust |
Avonmouth |
|
A404 road |
Central London
(Edgware Road station) |
Maidenhead |
The London section is called Harrow Road for most of its length. |
A405 road |
Leavesden Green |
Near Park Street |
|
A406 road |
Gunnersbury |
Beckton |
The North Circular Road |
A407 road |
Harlesden |
Child's Hill |
Through Willesden including the High Road and Cricklewood |
A408 road |
Harmondsworth |
Uxbridge |
The southern section in Sipson due to be demolished to make way for Heathrow Airport 3rd runway |
A409 road |
Northwick Park Hospital |
Bushey |
through the middle of Wealdstone and the western part of Stanmore known as Stanmore Common |
A410 road |
Pinner |
Edgware |
Uxbridge Road, through Stanmore Broadway, then London Road and Spur Road meeting the A41 |
A411 road |
Watford |
Barnet |
Meets the A41 twice between which it goes through the centre of Watford, Bushey Arches and Bushey Heath, then through the northern part of Elstree, across Stirling Corner through Arkley and into Barnet |
A412 road |
Slough |
Garston |
|
A413 road |
Gerrards Cross |
Towcester |
|
A414 road |
Near Hemel Hempstead |
Maldon |
|
A415 road |
Berinsfield |
Witney |
|
A416 road |
Amersham |
Berkhamsted |
|
A417 road |
Streatley |
Leominster |
|
A418 road |
M40 motorway J8a |
Ascott, Buckinghamshire |
|
A419 road |
Whitminster |
Swindon |
|
A420 road |
Bristol |
Oxford |
|
A421 road |
Croughton |
Wyboston |
|
A422 road |
Bedford |
Worcester |
Concurrent with the A46 between Stratford-upon-Avon and Alcester |
A423 road |
Hinksey Hill |
Coventry |
Formerly ran from Maidenhead to Coventry via Oxford and Banbury, and a small section of this remains as part of the Oxford Ring Road. Now begins its former route at Banbury. |
A424 road |
Burford |
A44 near Bourton-on-the-Hill |
|
A425 road |
Daventry |
Warwick |
|
A426 road |
Leicester |
Southam |
|
A427 road |
Market Harborough |
Oundle |
|
A428 road |
Coventry |
Cambridge |
This road is now split in two parts between Great Barford and Eaton Socon due to the extension of the A421 to the A1. |
A429 road |
Chippenham |
Coventry |
|
A430 road |
Quedgeley |
Longford, Gloucester |
|
A431 road |
Bristol |
Bath |
|
A432 road |
Bristol |
Old Sodbury |
|
A433 road |
A46 at Dunkirk |
A429 SW of Cirencester |
|
A435 road |
Birmingham |
Cirencester |
Concurrent with the A46 between Alcester and Teddington Hands |
A436 road |
A417 near Brockworth |
A44 near Salford, Oxfordshire |
|
A437 road |
Harlington, London |
A40 Western Avenue near Ickenham |
Originally Gloucester to Newport, now A48. |
A438 road |
M5 motorway Junction 9 |
Llanfilo |
|
A439 road |
Stratford-upon-Avon |
A46 4 miles SW of Warwick |
|
A441 road |
Birmingham |
Cookhill |
|
A442 road |
Droitwich |
Whitchurch |
|
A443 road |
Worcester |
Newnham Bridge |
|
A444 road |
Coventry |
Burton upon Trent |
|
A445 road |
Warwick |
A45 at Ryton-on-Dunsmore |
|
A446 road |
Little Packington |
Roughley |
|
A447 road |
Hinckley |
Coalville |
The original route through Hinckley was by-passed by a new road completed in the early 1990s |
A448 road |
Kidderminster |
Studley, Warwickshire |
The original route between Bromsgrove and Redditch was by-passed by a dual carriageway in the 1970s after Redditch was developed into a new town |
A449 road |
Newport |
Stafford |
|
A450 road |
Torton |
West Hagley |
|
A451 road |
Stourbridge |
Great Witley |
|
A452 road |
Leamington Spa |
Brownhills |
|
A453 road |
Nottingham |
Birmingham |
|
A454 road |
Bridgnorth |
Four Oaks |
The section through Willenhall was renumbered in the 1970s following the completion of The Keyway by-passing the south of the town, and further reumbering took place in 1995 on the completion of the Black Country Route |
A456 road |
Birmingham |
Woofferton |
The section through Halesowen was renumbered when the by-pass opened in the 1960s |
A457 road |
Birmingham |
Sedgley |
The original route through Smethwick town centre was renumbered when a by-pass opened in about 1970 |
A458 road |
Mallwyd |
Quinton |
Originally started in Dolgellau. Further renumberings have taken place over the years, notably when the town of Bridgnorth was by-passed in 1985 |
A459 road |
Halesowen |
Wolverhampton |
Renumbering took place when Dudley town centre was by-passed by a new route of the A461 in 1999. The road continued south of Halesowen towards Bromsgrove until the 1970s. |
A460 road |
Wolverhampton |
Rugeley |
The section through the centre of Cannock was renumbered in 1989 when the town's by-pass opened. |
A461 road |
Lichfield |
Stourbridge |
Concurrent with the A41 between Wednesbury & Great Bridge |
A462 road |
Wednesbury |
Laney Green |
The section through Darlaston town centre became unclassified when a new by-pass opened in the late 1960s |
A463 road |
Wombourne |
Willenhall |
The section beyond Coseley was either renumbered or became unclassified when the Black Country Route was completed between 1986 and 1995 |
A464 road |
Oaken |
Hollinswood |
|
A465 road |
Bromyard |
M4 motorway, Llandarcy |
|
A466 road |
King's Thorn |
Chepstow |
|
A467 road |
Duffryn, Newport |
A465, Brynmawr |
|
A468 road |
Bassaleg, Newport |
A470, Nantgarw |
|
A469 road |
A4161, Roath, Cardiff |
A465, Rhymney |
|
A470 road |
Cardiff |
Llandudno |
Originally Cardiff to Brecon. |
A472 road |
Treharris |
Usk |
|
A473 road |
Pontypridd |
Bridgend |
Originally started at Treforest but following the completion of the Church Village bypass it now starts at Upper Boat and the section between Treforest and Gwaun Meisgyn is now downgraded to the B4595. |
A474 road |
Briton Ferry |
Ammanford |
|
A475 road |
Newcastle Emlyn |
Lampeter |
|
A476 road |
Llanelli |
Llandeilo |
|
A477 road |
St Clears |
Johnston |
|
A478 road |
Cardigan |
Tenby |
|
A479 road |
Glanusk |
Llyswen |
Runs through the heart of the Brecon Beacons in Wales. Some maps incorrectly indicate another A479 running through Empire Way, Wembley (North West of London) but this actually is the B4565 |
A480 road |
A44 at Lyonshall |
A438 west of Hereford |
|
A482 road |
Aberaeron |
Llanwrda |
|
A483 road |
Swansea |
Chester |
by way of Wrexham. Becomes A5 road in the vicinity of Oswestry. |
A484 road |
Cardigan |
Cadle near Swansea |
by way of Newcastle Emlyn, Carmarthen and Llanelli |
A485 road |
Tanerdy |
Llanfarian |
|
A486 road |
New Quay |
A484 near Saron |
|
A487 road |
Haverfordwest |
Bangor |
|
A488 road |
Penybont |
Shrewsbury |
|
A489 road |
Craven Arms |
Machynlleth |
|
A490 road |
Churchstoke |
Llanfyllin |
|
A491 road |
Lydiate Ash |
Wall Heath |
|
A493 road |
Machynlleth |
Dolgellau |
Via Tywyn |
A494 road |
Queensferry |
Dolgellau |
Extension to M56 motorway opened late 2008. |
A495 road |
Whitchurch |
A458 near Llanfair Caereinion |
By-passes Oswestry as part of the A479 road which in turn becomes part of the A5 road. |
A496 road |
Llanelltyd |
Blaenau Ffestiniog |
Via Barmouth |
A497 road |
Porthmadog |
Nefyn |
|
A498 road |
Pen-y-Gwryd |
Porthmadog |
|
A499 road |
A487 |
Abersoch |
|