Road | From | To | Notes |
| Unused | | Ran from Copdock to Great Blakenham. |
| Bury St. Edmunds | Long Sutton | |
| Unused | | Was the original Lincoln northern bypass, which became the B1273 and a southeastward extension of the B1182 when the newer A46 and A158 Lincoln bypass opened. |
| West Rasen | Osgodby Moor | |
| Ulceby Cross | Mablethorpe | |
| Kingston upon Hull | Near Hessle | |
| Unused | | Ran from Pinchbeck Road to Commercial Road in Spalding via Elloe Avenue. |
| Cockburnspath | Near Burnmouth | |
| Chirton | Billy Mill | |
| Unused | | Ran from Lincoln Road in New England, Peterborough to Eastfield Road in Newark, Peterborough via St. Pauls Road, Dogsthorpe Road, Elmfield Road, and Newark Avenue. Previously allocated to a road from the A175 in South Bank to the A1085 in Grangetown. This became the B1446 and is now Middlesbrough Road, Eston Road, A66 and A1053. |
| New Southgate | A406 | The western section of Bowes Road that passes through Arnos Grove. |
| Alford | Sutton-on-Sea | Subject of the song 'the A1111' by John Shuttleworth, the stage persona of Graham Fellows. Previously allocated to another road elsewhere, but it is unknown where the previous route was. |
| Abridge | Dagenham | Southern section used to follow what is now A1240, and formerly, north of the A12 it was B196 as far as Hainault Forest and north of there part of a much longer B174, while south of the A124 it was part of a much longer B178. |
| Unused | | Ran from A1099 to A138 in Chelmsford. |
| Duplicated, one in Gateshead, one in Chelmsford | | See Anomalously numbered roads in Great Britain. Previously allocated to a road from A12 in Ipswich to A45 as the Ipswich north bypass. The section from west A1071 junction to east A1071 junction became part of the A12, leaving the section from the A12 to the A45. The remaining section became part of the A45 later. |
| Unused | | Ran from Winceby to Scremby. |
| Unused | | Ran from downtown Beccles to the A144 in Bungay. |
| Carlton Colville | Corton | |
| Unused | | Was a loop around the A12 in Lowestoft via Marine Parade. |
| Unused | | Ran from Lincoln Road in Peterborough via Burghley Road and Crawthorne Road to Eastfield Road. Previously allocated to another road elsewhere, but it is unknown where the previous route was. |
| Combs Ford | Yoxford | Previously allocated to a road in Cambridge from Newnham Road |
| Boston | Swineshead Bridge | Previously allocated to another road elsewhere, but it is unknown where the previous route was. |
| Outwell | Swaffham | |
| Huntingdon | Soham | |
| Sible Hedingham | Colchester | Original section on East Street and Greenstead Road was declassified when the A134 was rerouted. |
| Unused | | Ran from Thorpe Road in Peterborough via Thorpe Park Road, Grange Road, and Westfield Road to the A15. |
| Unused | | Ran from A14, later A604 spur in Huntingdon to A141 east of Huntingdon. |
| Unused | | Ran from downtown Peterborough to Eastfield Road via Broadway. |
| Unused | | Ran from A1126 to A141 in Huntingdon via Cromwell Walk and Brookside. |
| Fletton | Woodston, Cambridgeshire | |
| Stockton-on-Tees | Acklam | |
| Unused | | Ran from Milton Road to Parker Road in Cambridge via Victoria Avenue, Emmanuel Road, and Parker Street. |
| Unused | | Ran from Cambridge to Chesterton via Chesterton Road. |
| Winthorpe | Torksey | |
| Cambridge | Cambridge | Also the Cambridge Ring Road |
| Unused | | Ran on the old alignment of the A47 through Wisbech. |
| Healing | Grimsby | |
| Boston | Boston | |
| Boston | Boston Docks | |
| Eye | Orton, Peterborough | Doubles as Fletton Parkway, part of Peterborough's Parkway system and a major part of the city's road network. |
| Edinburgh | Edinburgh | This road runs from the A1 at Piershill to A199 at Portobello. The whole length of the road is called Portobello Road. |
| Hoggard's Green | Hadleigh | |
| Unused | | Ran from St. John's Street/Cornhill east via Brentgovel Street and Looms Lane to Northgate Street in Bury St Edmunds. |
| Unused | | Ran on St. Mary's Road in Beccles from Ballygate east to Blyburgate . |
| Oulton | Lowestoft | |
| Carlton Colville | Lowestoft | |
| Hatfield | Thorne | |
| Bedlington | Stakeford | |
| Monkseaton | Whitley Bay | |
| North Shields | Chirton | |
| Harrowgate Village | Great Burdon | |
| A147 Norwich | A149 near Stalham | Passes through Wroxham, the 'capital' of the Norfolk Broads |
| A12 North of Woodbridge | Rendlesham | |
| Barking | Becontree | |
| Stevenage | Stevenage | |
| Ipswich | Ipswich | Former A45 |
| Unused | | Ran on the Darlington ring road; became part of the A68 and A167 when the A68 was extended and the A167 was rerouted out of the city centre. |
| Westcliff-on-Sea | Prittlewell | |
| Southend on Sea | Southend Airport | |
| Southend on Sea | Seafront | Short link road from A13 |
| Unused | | Ran on the old alignment of the A122 from Epping to North Weald Bassett |
| Unused | | Ran from A1102 to A15 in Lincoln. |
| Unused | | Ran from A1164 to A165 in Kingston upon Hull via Jameson Street, George Street, and Witham. |
| Unused | | Ran from A63 to A1079 in Kingston upon Hull via Carr Lane/Anlaby Road and Ferensway. |
| A63 in Kingston upon Hull | A1079 in Kingston upon Hull | |
| Anlaby Park | Kingston upon Hull | |
| Berwick | Scremerston | Previously allocated to a road from Boroughbridge to Green Hammerton |
| Chigwell Rolls Park | Loughton Homebase | Formerly B171 |
| Harlow | Harlow | |
| Ware | Turnford | |
| Annitsford | Cramlington | |
| Cramlington | Cramlington | |
| Caistor | Immingham | |
| Kingston upon Hull | Beverley | This road includes the notorious Grovehill junction, which has 42 traffic lights. |
| Spalding | Stamford | Previous route of A16 road between Spalding and Stamford, before completion of the A1073 upgrade. |
| A59 in York | A19 in York | Follows Water End. |
| Unused | | Ran from A1105 in Hessle to A164 in Anlaby. |
| Unused | | Temporary designation for what is now the M25 between junctions 23 and 24. Would have been part of the planned M16. |
| Peterborough | Longthorpe | |
| Unused | | Ran from High Street to Newark Road in Lincoln and A1192 ). |
| Bishops Stortford | Harlow | Most of this formed the old A11 route between the two towns |
| Wolviston | Seal Sands | |
| Unused | | Was once reserved for a road with a description of "A406 Woodford Avenue". The A1400 number was used instead. |
| Rushmere St. Andrew | Nacton Heath | |
| Unused | | Ran from High Street to Canwick Road in Lincoln |
| Proposed | | Was a proposed road from A1052 in Houghton-le-Spring to B1284 in Rye Hill, and would have probably taken over the B1284 to the A690. It has since been subsumed into a more extensive long-term plan to bypass and reroute the A182 on new construction from Shiney Row to A19 east of Murton via the Central Route, Hetton Bypass and the partially complete East Durham Link Road. |
| Lincoln | North Hykeham | New route created in 2017; replaced part of the B1003. |
| A1042 east of Norwich | A1270 | Broadland Gate Link |
| Royston, Hertfordshire | Godmanchester, Huntingdonshire | Original route of the A14 |
| Duplicated, one in Islington, London, and one in Woodford, London | | See Anomalously numbered roads in Great Britain |
Road | From | To | Notes |
| Moorfields Eye Hospital | Highbury & Islington station | |
| Canonbury | Alexandra Palace | |
| Central London | Central London to A11 in London via Fenchurch Street. |
| Threadneedle Street, London | King William Street | |
| Ipswich | Martlesham | Former route of A12, prior to Ipswich Southern/Eastern by-pass |
| Washington | Central Sunderland | Also known as the Sunderland Highway |
| Colchester | A12/A120 | Former A12 alignment through northern Colchester. See also A120 |
| Basildon | Basildon | Cranes Farm Road, parallels the A127 and the A1321 between the A176 and A132 roads |
| Copmanthorpe, North Yorkshire | A64 | York Outer Ring Road |
| Thorpe Willoughby | Barlby | |
| Becontree | Dagenham | Formerly part of the A1112, which was rerouted to the east |
| Unused | | Ran along the current B198 from A10 to A121 west of Cheshunt; this is now the B198. |
| Norwich | Thorpe St Andrew | Previously part of the A47 prior to the construction of the Norwich southern bypass. |
| Great Yarmouth | Great Yarmouth | Shares the same number with Scartho Road and a stretch of Louth Road to the south of Grimsby. See Anomalously numbered roads in Great Britain |
| | | Reserved for the Northern Gateway Access Road near Waltham Abbey. It would go from the A1055 to A121 if built. |
| Benfleet | Howe Green | Previously the A130 |
| Selby Fork | Brotherton | Previously part of the A1 |
| Bishops Stortford | Bishops Stortford | |
| Romford | Romford | |
| Peterborough | Peterborough | |
| Limehouse | Leamouth | Aspen Way, East India Dock Link tunnel, and West India Dock Road in Docklands |
| Unused | | Ran on the Aspen Way Tunnel in London Docklands from the A1261 to the A13; this is now part of the A1261. |
| Unused | | Ran on Leamouth Road in London Docklands from the A13 to the A1020; this is now part of the A1020. |
| Taverham | Rackheath | Norwich Northern Distributor Road |
| Sunderland | Monkwearmouth | Sections known as Southwick Road, Keir Hardie Way, Queen's Road, Wessington Way |
| Jarrow | South Shields | John Reid Road, South Shields southern ring road |
| Trumpington | Stump Cross | Previously allocated to a road from Sadlers Farm to Canvey Island. This became part of the A130 and B1014. The current A1301 was created on a former section of the A130 when sections of the A130 were downgraded when the parallel M11 was built. |
| Westley, Suffolk | Southgate Bridge | |
| Hardwick | Newmarket | Former A45 |
| Six Mile Bottom, Cambridgeshire | Water Hall | Former A11 |
| Stockton-on-Tees | Stockton-on-Tees | |
| Dagenham | North Stifford | Former A13 alignment, with unclassified Lodge Lane connecting to the A1013. Eastern section was the main route till the 1980s. Western section was the main route until as recently as the late 1990s. |
| Huntingdon | Haverhill | Formerly A604 and before that A132. Follows the old route of the A14 over the ECML which will be demolished and replaced with a route that goes through the city centre of Huntingdon in 2021. |
| Stowmarket | Combs Ford | |
| Trumpington, Cambridgeshire | Milton, Cambridgeshire | Former A10 alignment |
| South Hornchurch | South Hornchurch | Marsh Way, link road between A13 and A1306. Briefly part of A13 during completion of Thames Gateway 1998–9. |
| Basildon | Basildon | Broadmayne, parallels the A1235 between the A176 and A132 roads |
| A12 north of Myland | A134 in Myland | Created in 2015 along the Severalls Link Road. |
| Unused | | Mapping error for the A1308. |
| North Circular Charlie Brown's Roundabout | Gants Hill | Formerly A406, but this section was only briefly considered part of the North Circular, the latter historically using the A104/A114/A116/A117 until 1987. |
| Norwich | Hellesdon | Former routing of the A140 |
| Haddenham | Witcham | |
| Lincoln | South Hykeham | |
| Scampton, West Lindsey, Lincolnshire | Marton, West Lindsey, Lincolnshire | Forms the eastern section of the Roman road from Ermine Street to Bawtry, fording the River Trent at Littleborough, then onto the Roman Fort at Doncaster. |