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The Inland Waterways of Great Britain
A B BCN C D E-F G H-K L M N O P R S T U-V W-Y
| Waterway | Navigation Authority | Status | Length (miles) | Length (km) |
| Aberdare Canal | None | Derelict | 7.0m | 11.3km |
| Abderdeenshire Canal | None | Derelict | 18.0m | 29.0km |
| Adelphi Canal | None | Derelict | 0.5m | 0.8km |
| River Adur (mouth of the river to Old Shoreham Bridge) | Shoreham Port Authority | Open | 3.3m | 5.3km |
| River Adur (Old Shoreham Bridge to Bines Bridge) | (EA Byelaws) | Open | 9.1m | 14.6km |
| River Adur - Eastern Branch (Shermanbury Place to junction with Western Branch) | (EA Byelaws) | Open | 2.0m | 3.2km |
| Aike Beck | None | Derelict | 2.0m | 3.2km |
| Aire & Calder Navigation - Leeds & Liverpool Canal to junction with Selby Canal | British Waterways | Open | 23.5m | 37.8km |
| Aire & Calder Navigation - Tidal section (Selby Branch to junction with river Ouse at Asselby Island) | None | Derelict | 16.8m | 27.0km |
| Aire & Calder Navigation - Branches | None | Derelict | 1.5m | 2.4km |
| Aire & Calder Navigation - Knottingley & Goole Canal | British Waterways | Open | 17.0m | 27.4km |
| Aire & Calder Navigation - Wakefield Section | British Waterways | Open | 7.5m | 12.1km |
| River Alde and River Ore | None | Open | 17.0m | 27.4km |
| River Ancholme - Humber to Harlam Hill Lock | Environment Agency | Open | 16.5m | 26.6km |
| River Ancholme - Harlam Hill Lock to Bishopbridge | Environment Agency | Restored | 2.5m | 4.0km |
| River Ancholme - Brigg Loop | Environment Agency | Open | 1.8m | 2.9km |
| Andover Canal | None | Derelict | 22.0m | 35.4km |
| River Ant | Broads Authority | Open | 8.0km | 12.9km |
| River Arun (Arundel Bridge to Pallingham) | (EA Byelaws) | Open | 18.8m | 30.3km |
| River Arun (Sea to Arundel Bridge) | Littlehampton Harbour Board | Open | 6.7m | 10.8km |
| Arun Navigation - Hardham Cut | None | Derelict | 2.5m | 4.0km |
| Ashby Canal (Marston Jn to Snarestone) | British Waterways | Open | 22.0m | 35.4km |
| Ashby Canal (Snarestone to Moira) | Leics CC | Under Restoration | 8.0m | 12.9km |
| Ashton Canal - main line | British Waterways | Restored | 6.7m | 10.8km |
| Ashton Canal - Hollingwood Branch | None | Under Restoration | 4.5m | 7.2km |
| Ashton Canal - Stockport Branch | None | Proposed Restoration | 5.0m | 8.1km |
| Ashton Canal - Beat Bank Branch | None | Derelict | 3.0m | 4.8km |
| Ashton Canal - other branches | None | Derelict | 2.5m | 4.0km |
| River Avon (Bristol) - below Hanham Lock | Bristol City Council | Open | 14.5m | 23.3km |
| River Avon (Hampshire) | None | Derelict | 36.0m | 58.0km |
| River Avon (Warwickshire) - Lower | Avon Navigation Trust | Restored | 25.8m | 41.5km |
| River Avon (Warwickshire) - Upper | Avon Navigation Trust | Restored | 19.6m | 31.6km |
| River Avon (Warwickshire) - Higher | None | Restoration Proposed | 9.0m | 14.6km |
| Aylsham Navigation | None | Derelict | 9.0m | 14.5km |