| Road |
From |
To |
Notes |
| B4401 |
A5 at Corwen, Denbighshire |
A494 near Bala, Gwynedd |
|
| B4402 |
A494 |
B4391 |
|
| B4403 |
A494 at Llanuwchllyn, Gwynedd |
B4391 near Bala, Gwynedd |
Runs along the eastern side of Bala Lake |
| B4404 |
A489 at Cemmaes Road, Powys |
A487 near Machynlleth, Powys |
|
| B4405 |
A487 at Minffordd, Gwynedd |
A493 near Tywyn, Gwynedd |
| B4410 |
A498 north of Prenteg |
A487 near Maentwrog |
Sarn Helen - crosses A4085 at Garreg |
| B4416 |
A470 near Dolgellau, Gwynedd |
A494 near Dolgellau, Gwynedd |
| B4422 |
Bodorgran (Anglesey) with road A4080 |
B5109 Llangefni Anglesey |
| B4425 |
A40 near Burford |
A429 east of Cirencester |
Formerly part of the A433 |
| B4427 |
B4058 at Hambrook, South Gloucestershire |
A38 at Rudgeway |
Old Gloucester Road |
| B4429 |
A428 at Rugby |
M45/A45 at Thurlaston |
|
| B4434 |
A474 in Neath |
A465 at Resolven |
|
| B4436 |
A4118 near Langrove |
A4067 at Blackpill |
|
| B4437 |
A44 near Wootton, Oxfordshire |
A361 north of Burford |
via Charlbury |
| B4438 |
A452 in Bickenhill, West Midlands |
B4102 at Catherine-de-Barnes, West Midlands |
Passes through Birmingham Airport |
| B4442 |
A404 at Little Chalfont |
A413 at Chalfont St Giles |
|
| B4445 |
A418 at Thame |
B4009 at Chinnor |
|
| B4449 |
B4044 at Eynsham, Oxfordshire |
A4095 at Bampton |
|
| B4450 |
Chipping Norton, Oxfordshire |
A436 east of Stow-on-the-Wold |
via Bledington |
| B4451 |
B4100 at Gaydon, Warwickshire |
A425 at Southam, Warwickshire |
|
| B4453 |
A445 in Leamington Spa, Warwickshire |
A45 at Dunstore Heath near Rugby, Warwickshire |
|
| B4455 |
A429 near Halford, Warwickshire |
A5 at High Cross, Leicestershire |
Part of the Fosse Way (Roman road) |
| B4461 |
M48 at Aust |
B4061 at Alveston |
|
| B4464 |
A454, near Willenhall, West Midlands |
A454/M6 junction, Bentley, West Midlands |
Former route of A454 through Willenhall Town Centre |
| B4465 |
A420 at Easton, Bristol |
A46 near Tormarton |
Passes through Chester Park, Staple Hill and Pucklechurch, ending near Junction 18 of the M4 |
| B4466 |
A4 (Hotwells Road), Bristol |
A4018 at Clifton, Bristol |
|
Wikimedia Commons has media related to: B4466 |
Jacob's Wells Road |
| B4467 |
B3129 in Clifton, Bristol |
A4176 at Clifton Down |
|
Wikimedia Commons has media related to: B4467 |
Pembroke Road |
| B4468 |
A4018 at Durdham Down, Bristol |
A38 at Horfield, Bristol |
|
Wikimedia Commons has media related to: B4468 |
Coldharbour Road and Kellaway Avenue |
| B4469 |
A38 at Horfield, Bristol |
A420 at St George, Bristol |
Muller Road and Rose Green Road |
| B4473 |
A458 west of Shrewsbury |
B4380 at Montford Bridge, Shropshire |
1 mile long; crosses A5 |
| B4483 |
B4163 in Coseley, West Midlands |
A457 in Woodsetton, West Midlands |
|
| B4484 |
A460 in Fallings Park, Wolverhampton |
Bilston Town Centre |
|
| B4485 |
A44 at Worcester |
A4440 at Worcester |
|
| B4489 |
A483 at Swansea |
A48 and the M4 at Junction 46 |
|
| B4492 |
A4000 at Gypsy Corner, North Acton just north of the A40, Western Avenue |
A4000 at Harlesden, just south of the A404 |
"Alternative" route through Park Royal via North Middlesex Hospital |
| B4493 |
A417 at Harwell, Oxfordshire |
A4130 at Didcot, Oxfordshire |
|
| B4494 |
A4 at Newbury |
Wantage |
|
| B4495 |
A4144 Abingdon Road, Oxford |
A4165 Banbury Road, Summertown, Oxford |
Passes through the east of Oxford, over Donnington Bridge, through Cowley and Headington, then Marston Ferry Road |
| B4499 |
A488 at Minsterley, Shropshire |
B4386 at Brockton, Shropshire |
|