Canals first saw use during the Roman occupation of the south of Great Britain and were used mainly for irrigation. The Romans also created several navigable canals, such as
Foss Dyke, to link rivers, enabling increased transport inland by water. The United Kingdom's navigable water network grew as the demand for industrial transport increased. The canals were key to the pace of the Industrial Revolution: roads at the time were unsuitable for large volumes of traffic. A system of very large pack horse trains had developed, but few roads were suitable for wheeled vehicles able to transport large amounts of materials (especially fragile manufactured goods such as pottery) quickly. Canal boats were much quicker, could carry large volumes, and were much safer for fragile items. Following the success of first the
Sankey Canal followed by the
Bridgewater Canal, other canals were constructed between industrial centres, cities and ports, and were soon transporting raw materials (particularly coal and lumber) and manufactured goods. There were immediate benefits to households, as well as to commerce: in
Manchester, the cost of coal fell by 75% when the Bridgewater Canal arrived. can accommodate ships with a length of up to . As the
Industrial Revolution took hold in the end of the 18th and beginning of the 19th centuries, the technology allowed canals to be improved. The early canals contoured round hills and valleys, later ones went straighter. Locks took canals up and down hills, and they strode across valleys on taller and longer aqueducts and through hills in longer and deeper tunnels. From the mid-19th century, railways began to replace canals, especially those built with the standard narrow () bridges and locks. As trains, and later road vehicles, became more advanced, they became cheaper than the narrow canal system, being faster, and able to carry much larger cargoes. The canal network declined, and many canals were bought by railway companies – in some cases to enable them to penetrate rival companies' areas transhipping to/from canal boats. Some narrow canals became unusable, filled with weeds, silt and rubbish, or were converted to railways. There was a late burst of wide-waterway building (e.g. the
Caledonian Canal, and the
Manchester Ship Canal), and of invention and innovation by people such as Bartholomew of the Aire and Calder company, who conceived the trains of nineteen coal-filled "Tom Pudding" compartment boats that were pulled along the
Aire and Calder Navigation from the Yorkshire coalfields, then lifted bodily to upturn their contents directly into seagoing colliers at
Goole Docks (their descendants, Hargreaves' tugs pushing three coal-pans trains to be upended into hoppers at the Aire power stations lasted as late as 2004). However, the last new canal before the end of the 20th century was the
New Junction Canal in Yorkshire (now South Yorkshire) in 1905. As competition intensified, horse-drawn single narrowboats were replaced by steam and later diesel powered boats towing an unpowered butty, and many of the boatmen's families abandoned their shore homes for a life afloat, to help with boat handling and to reduce accommodation costs – the birth of the "boatman's cabin" with bright white lace, gleaming brass and gaily-painted metalware. A trip on the canal system was described colloquially as "a cruise on the cut". Constant lowering of tolls meant that the carriage of some bulky, non-perishable, and non-vital goods by water was still feasible on some inland waterways – but the death knell for commercial carrying on the narrow canals was sounded in the winter of 1962–63, when a long hard frost kept goods icebound on the canals for three months. A few of the remaining customers turned to road and rail haulage to ensure reliability of supply and never returned, though both rail and road had been severely disrupted by the frost and snow too. Other narrowboat traffic gradually ceased with the change from coal to oil, the closure of canalside factories, and run-down of British heavy industry. The last long-distance narrowboat traffics, coal from the Midlands to Dickinson's paper mills at Croxley and the Kearley and Tonge jam factory at Southall both ceased in 1970 – the Croxley mills had changed to oil and the jam factory closed for re-location. Regular narrowboat traffics continued, such as lime juice from Brentford to Boxmoor (until 1981) while aggregates were carried on the River Soar until 1988. Some individual waterways (especially the
Manchester Ship Canal, the
Aire and Calder Navigation and the other large waterways) remain viable, carrying many millions of tonnes per year and there are still hopes for development, but
containerisation of ports and lorries has mostly passed the waterways by. The last major investment development of the inland waterways was the enlargement of the
Sheffield and South Yorkshire Navigation in the early 1980s to cope with barges of standard European dimensions that never came. There have been a number of successful initiatives to get more traffic on to the larger inland waterways, though even the Manchester Ship Canal does not convey cargo ships to the docks in Salford, which have become little more than a water feature for the apartments, offices and cultural institutions of 'Salford Quays' that have replaced the wharves and warehouses. ==Growth of leisure use==