The main navigable waterways in Great Britain

A
Aire & Calder Navigation
River Ancholme
Ashby Canal
Ashton Canal
Avon Navigation (Warwickshire)

B
Basingstoke Canal
Birmingham Canal
Birmingham & Fazeley Canal
Bridgewater Canal
Bridgwater & Taunton Canal
Bristol Avon Navigation

C
Calder & Hebble Navigation
Caldon Canal
Caledonian Canal
River Cam
Chelmer & Blackwater Navigation
Chesterfield Canal
Coventry Canal
Crinan Canal

D
River Dee
Droitwich Canals
Dudley Canals

E
Erewash Canal

F
Forth & Clyde Canal
Fossdyke & Witham navigations

G
River Glen
Gloucester & Sharpness Canal
Grand Union Canal - London to Braunston 
Grand Union Canal - Braunston to Birmingham
Grand Union Canal - Leicester Line 
Great Ouse Navigation

H
River Hamble
Huddersfield Broad Canal
Huddersfield Narrow Canal
River Hull

I
River Idle

K
Kennet & Avon Canal

L
Lancaster Canal
Lee & Stort navigations
Leeds & Liverpool Canal
Llangollen Canal

M
Macclesfield Canal
Manchester Ship Canal
River Medway
Middle Level Navigations
Monmouthshire, Brecon & Abergavenny Canals
Montgomery Canal

N
River Nene
Norfolk & Suffolk Broads

O
Oxford Canal

P
Peak Forest Canal
Pocklington Canal

R
Regents Canal
Ripon Canal
Rochdale Canal
Rushall Canal

S
Selby Canal
River Severn
Sheffield & South Yorkshire Navigation
Shropshire Union Canal
Sleaford Navigation
River Soar Navigation
Staffordshire & Worcestershire Canal
Stourbridge Canal
Stratford-on-Avon Canal

T
Tame Valley Canal
River Tees
River Thames (Tidal Navigation - Port of London Authority)
River Thames (Non-tidal Navigation - Environment Agency)
River Trent
Trent and Mersey Canal

U
Union Canal

W
Walsall Canal
River Weaver Navigation
River Wey
River Welland
Witham Navigable Drains
Worcester & Birmingham Canal
Wyrley & Essington Canal 

Y
Yorkshire Ouse Navigation