The Full Wiki

More info on Grand Union Canal

Grand Union Canal: Map


Wikipedia article:

Map showing all locations mentioned on Wikipedia article:

The Grand Union Canal at Westbourne Park, London
The Grand Union Canal near Westbourne Park, London
The Grand Union Canal in Englandmarker is part of the British canal system. Its main line connects Londonmarker and Birminghammarker, stretching for 220 km (137 miles) with 166 locks. It has arms to places including Leicestermarker, Sloughmarker, Aylesburymarker, Wendovermarker and Northamptonmarker.

The Grand Union Canal was also the original name for part of what is now part of the Leicester Line of the modern Grand Union: this latter is now generally referred to as the Old Grand Union Canalmarker where necessary to avoid ambiguity.


With competition from the railways having taken a large share of traffic in the second half of the 19th century, improvements in roads and vehicle technology in the early part of the 20th century meant that the lorry was also becoming a threat to the canals. Tolls had been reduced to compete with the railways, but there was little scope for further reduction. The Regent's Canal and Grand Junction Canal agreed that amalgamation and modernisation were the only way to remain competitive.

The (present) Grand Union Canal came into being on 1 January 1929, extended in 1932. It was formed from the amalgamation of several different canals:

London area
Main Line
  • Warwick and Napton Canal – bought by the Regent's Canal in 1927
  • Warwick and Birmingham Canal – bought by the Regent's Canal in 1927
  • Birmingham and Warwick Junction Canal – bought by the Regent's Canal in 1927
  • Grand Junction Canalmarker – bought by the Regent's Canal in 1927
Leicester Line
  • Old Grand Union Canalmarker – bought by the Grand Junction in 1894
  • Leicestershire and Northamptonshire Union Canal – bought by the Grand Junction in 1894
  • Leicester Navigation – bought by the Grand Union in 1932
  • Loughborough Navigation – bought by the Grand Union in 1932
  • Erewash Canal – bought by the Grand Union in 1932

A 5-mile (8-km) section of the Oxford Canalmarker forms the main line of the Grand Union between Braunston and Napton. Although the Grand Union intended to buy the Oxford Canal and Coventry Canal, this did not take place.

The section of the main line between Brentford and Braunston (formerly the Grand Junction Canal), was built as a 'wide' or 'broad' canal - that is, its locks were wide enough to accommodate two narrowboats abreast (side by side) or a single wide barge up to 14 feet (4.27 m) in beam.

However, the onward sections from Braunstonmarker to Birminghammarker had been built as 'narrow' canals – that is, the locks could accommodate only a single narrowboat. An Act of Parliament of 1931 was passed authorising a key part of the modernisation scheme of the Grand Union, supported by Government grants. The narrow locks (and several bridges) between Napton and Camp Hill Top Lock in Birmingham were rebuilt to take widebeam boats or barges up to 12 feet 6 inches (3.81 m) in beam, or two narrowboats. The canal was dredged and bank improvements carried out: the depth was increased to 5 feet 6 inches (1.68 m) to allow heavier cargoes, and the minimum width increased to 26 feet (7.92 m) to enable two boats of 12 feet 6 inches to pass. Lock works were completed in 1934 when the Duke of Kent opened the new broad locks at Hatton, and other improvements finished by 1937.

However, these improvements to depth and width were never carried out between Braunston and London. Camp Hill Locks in Birmingham were not widened, as it would have been very expensive and of little point, since they lead only to further flights of locks not in the ownership of the Grand Union. A new basin and warehouse were constructed at Tyseley, above Camp Hill, to deal with this. Although the Grand Union company had a number of broad boats built to take advantage of the improvements, they never really caught on and the canal continued to be operated largely by pairs of narrow boats, whose journeys were facilitated by the newly widened locks in which they could breast up.

The three sections between Norton junction and the River Trent (collectively known as the 'Leicester line') are mixed in size. From Norton to Foxton, the route is a narrow canal. From below Foxton to Leicester it is a wide canal. From Leicestermarker to the Trent, the route is effectively the River Soar and the locks and bridges are wide. Another Act of 1931 authorised the widening of the locks at Watfordmarker and Foxtonmarker, but with Government grants for this section not forthcoming, the work was not carried out.

The Grand Union Canal was nationalised in 1948, control transferring to the British Transport Commission, and in 1962 to the British Waterways Board, later British Waterways. Commercial traffic continued to decline, effectively ceasing in the 1970s, though lime juice was carried from Brentford to Boxmoor until 1981, and aggregates on the River Soar until 1996. However, leisure traffic took over, and the canal is now as busy as it ever was, with leisure boating complemented by fishing, towpath walking and gongoozling. More recently freight traffic has returned with the carriage of aggregates from Denham to West Drayton in barges and narrow boats, and the opening of a new wharf for re-cyclables and aggregates at Old Oak Commonmarker.

A lock at Apsley


One end of the Grand Union Canal (Grand Junction Canal - Main Line) is at Brentfordmarker on the River Thames in West London, where the canal follows the engineered course of the River Brentmarker. The double Thames Lock at Brentford acts as the demarcation point between the Thames, administered by the Port of London Authoritymarker, and the River Brent/Grand Union Canal, administered by British Waterways. The locks on the canal are numbered south from Braunston, and Thames Lock is lock number 101.

From the Thames Lock, the canal and the River Brentmarker are one and the same, and the waterway is semi-tidal until the double Gauging Lock (lock 100) at Brentford is reached. Just upstream of the Gauging Lock was a large canal basin, now known as Brentford Lock, from which the canal continues to follow the course of the River Brentmarker through two more locks. The river and canal part company at the base of the Hanwellmarker flight of locks (92-97), before two more locks take the canal to Norwood Greenmarker. It then heads westward over level ground through Southallmarker, Hayesmarker and West Draytonmarker until it reaches the valley of the River Colnemarker where it swings northward to Cowleymarker through Uxbridgemarker.

Three miles (5 km) from Norwood on this long level is Bulls Bridge Junction, once the site of the Grand Union Canal Carrying Company's main dockyard. At Bulls Bridge, the Paddington Arm branches off to the north and runs 12 miles (19 km) to join the Regents Canal at Little Venice (see below). Just before Uxbridge is Cowley Peachey junction, where the Slough Armmarker branches off westward.

At Cowley, the canal begins to climb the valley of the River Colne following a north-westerly course. After Uxbridgemarker, there are many disused gravel workings in the valley so the canal is surrounded by lakes as it passes Denham and Harefieldmarker before veering north-east to Rickmansworthmarker.

From Rickmansworth, the canal follows the valley of the River Gade, a tributary of the Colne. After passing the site of Croxley paper mill, the canal skirts Watfordmarker through Cassiobury Parkmarker, passes under the M25 motorwaymarker and approaches Kings Langleymarker. The canal here passes the site of the former Ovaltine factory, which was once supplied with raw materials by canal.

By now the locks are becoming more frequent as the climb into the Chiltern Hillsmarker steepens. The original four locks here were replaced in 1819 by five shallower ones to alleviate problems with water supply to the nearby paper mills. This realigned the canal to the south of its former course; the locks here are still referred to - without irony - as "The New 'Uns" by traditional boaters, and the term has been passed on to a new generation of canal users.

After Kings Langleymarker and Apsleymarker - the site of more former paper mills - the canal passes Hemel Hempsteadmarker and Boxmoor Common. From here the canal follows the course of the River Bulbourne through Bourne Endmarker with the well-known swingbridge at Winkwell, and the "Port of Berkhamstedmarker". At Cow Roast Lock the canal reaches the 3-mile (5-km) long summit level at Tring in the Chiltern hills, having risen through 54 locks since Brentford.

At the north-west end of the summit level is Bulbourne Works, where lock gates were manufactured until 2003 for the southern canal network. Half a mile (800 m) further on, the canal reaches the top of the Marsworth flight of seven locks, which begin the descent to the Vale of Aylesburymarker. The Wendover Arm branches off westwards from the summit level under a bridge adjacent to Marsworth Top Lock and is currently navigable for just over a mile to moorings and a winding hole. There is a restoration project to extend it back to Wendover. This part of the canal in parlance used by natives and canal staff was "the withered arm" and in fact was only really "opened" to allow the pumping station there to pump water into the summit. A few hundred yards (metres) beyond the bottom lock of the flight, the Aylesburymarker Arm branches off to the south west.

The Grand Union crosses the wide valley gradually, descending by interspersed locks past the villages of Cheddingtonmarker, Horton and Slapton until it reaches Leighton Buzzardmarker. Traditionally this section of the canal is called "Slapton Fields" or just "The Fields" by boaters.

A few miles further on it enters Milton Keynesmarker at the outskirts of Bletchleymarker at Fenny Stratfordmarker Lock, which is unusual in lowering the level by only 12 inches (30 cm). The next stretch of 11 miles (18 km) on the level takes the canal through the new city, where there is a marina. (There is a plan to dig a new arm from here to the Great Ousemarker at Bedfordmarker). North of the centre, it traverses the modern New Bradwellmarker Aqueduct, the first on the Grand Union in over 100 years. Leaving Milton Keynes at Wolvertonmarker, the canal runs on a high embankment before passing over the Great Ouse at Cosgrovemarker "Iron Trunk" aqueduct.

After rising through Cosgrove Lock, (and passing the start of the abandoned Buckingham Armmarker) another long level section brings the canal to the bottom of the Stoke Bruernemarker flight of seven locks. At the top of this flight is the Stoke Bruerne Canal Museummarker followed shortly by Blisworth Tunnelmarker, at 3056 yards (2794 m) one of the longest on the canal network.

Crick Wharf, Northamptonshire
Once clear of the tunnel, the canal passes Blisworthmarker village and reaches Gayton Junction where the Northamptonmarker Arm branches off to the east. This arm has seventeen narrow locks as it descends to join the navigable River Nenemarker (see below). The long level stretch continues past several villages including Nether Heyfordmarker and Weedon Becmarker and is very rural in character.

At Whiltonmarker, the canal reaches the bottom of the Buckby flight of seven locks which raise it to Braunstonmarker summit although the village of that name is still 5 miles (8 km) distant. Beyond the top lock is Norton Junctionmarker where the Leicester line (not strictly a branch) heads off north. A few miles further on the canal passes through the 2040-yard (1865-m) Braunston Tunnelmarker, which pierces a low range of hills that are part of the Northamptonshiremarker uplands.

The canal then drops down the Braunston flight of six locks until it reaches Braunston Junction, just over 93 miles (150 km) from Brentford.

The Birmingham "main line"

At Braunston Junction, the Oxford Canalmarker diverges north and south. The north section leads to Rugbymarker and Coventrymarker; the southward fork carries both the Oxford Canalmarker and the Grand Union for 5 miles (8 km) to Napton Junctionmarker. Here, the Grand Union heads north towards Birminghammarker, while the Oxford Canal veers south towards Banburymarker and Oxfordmarker.

Shortly after Napton Junction, the Grand Union reaches three locks at Calcutt, which begin the descent to the Warwickshiremarker River Avon. After a 3-mile (5-km) level, the canal descends into the valley of the River Leammarker by the Stocktonmarker flight of ten locks (often known as 'the Itchington Ten'). Above the eighth lock down the flight, a short arm (now used as pleasure craft moorings) used to serve Southammarker cement works.

From the bottom of the locks, a 3-mile (5-km) level leads to the four Bascote locks. The top two form a 'riser' or staircase. Six more interspersed locks lead to Radford, after which a 5-mile (8-km) level takes the canal through Leamington Spamarker to Warwickmarker. Between these two towns, the canal crosses the River Avon and the former Great Western Railway on aqueducts.

At Warwick, the canal rises by two locks to Budbrookemarker Junction (formerly the junction with the then-independent Warwick and Birmingham Canal). To the left is the restored Saltisford Canal Arm, a short stretch that used to run under the railway to the original canal basin complex and terminus of the Warwick and Birmingham Canal - the basin was filled-in in the 1970s. The Canal used to serve the oldest gas works in the world and several unusual hexagonal buildings remain opposite Sainsburys. Saltisford Canal TrustAfter half a mile the mainline reaches the bottom of the Hattonmarker flight of 21 locks that lift the canal up out of the Avon Valley. The first ten locks are spaced out but from the middle lock the flight is tightly spaced.

Three miles (5 km) from Hatton Top Lock the canal passes through Shrewley Tunnelmarker, with its separate horse tunnel, and then passes Rowington village to Kingswood Junction where a short spur connects with the Stratford-upon-Avon Canalmarker. Another 3 miles (5 km) lead to the Knowlemarker flight of five locks. Finally, an 11-mile (18-km) level takes the canal through Elmdon Heath, Solihull, Acocks Green, and Tyseley to the heart of Birmingham.

The main line may be considered to terminate at Bordesley Junctionmarker. From here, there are two routes, both part of the Grand Union Canal. The original line of the Warwick and Birmingham Canal leads to the Digbeth Branch Canal of the Birmingham Canal Navigationsmarker at the Warwick Barmarker, while the later line of the Birmingham and Warwick Junction Canal leads to the Birmingham and Fazeley Canal (and Tame Valley Canal) at Salford Junctionmarker, which in turn has connections to the Coventry Canal and the Trent and Mersey Canal.

The Leicester Line

Formed by amalgamations of once-independent canals, the 'Leicester Line' of the Grand Union Canal runs north from Norton Junction for about 35 miles (56 km) until it reaches Leicestermarker, where it joins the River Soarmarker to provide a link to the River Trent and to the Trent and Mersey Canal. It includes notable tunnels south of Crickmarker 1528 yd (1397 m) and north of Husbands Bosworthmarker 1166 yd (1066 m) The village of Crick is home to a popular annual boat showmarker.

Also on this section are the well-known features of Foxton Locksmarker and Watford Locksmarker, both of which feature staircase locks. Beside Foxton locks is the site of a long-abandoned inclined plane boat lift. This was constructed as part of a project to create a wide-beam canal route to connect the northern and southern parts of the canal system, something which does not exist to this day. Funding to deal with the narrow locks at Watford was not forthcoming and the scheme was aborted. From Foxton Junction, at the bottom of the locks, the canal is wide-beam to Leicester and onwards, as it was originally intended to link the Soar at Leicester with the River Nenemarker at Northampton. However, the canal never went further than the basin at Market Harboroughmarker.


The Grand Union Canal has several branches, usually termed 'arms'. Five miles (8 km) from Brentfordmarker, the Paddington Arm leads to Paddington Basinmarker and, just north-west of the Basin at 'Little Venice', it connects to the Regent's Canal. At Cowley Peachey, the Slough Armmarker runs 5 miles (8 km) to the west. At Marsworth, about 35 miles (56 km) from Brentfordmarker, two arms leave the main line, one to Wendover (not currently navigable for its full length but being restored by the Wendover Arm Trust) and the other descends through sixteen narrow locks for 4 miles (6 km) to Aylesburymarker. From Gayton Junction, about 60 miles (97 km) from Brentford, the Northamptonmarker Arm links with the River Nenemarker.

At Warwick the last remaining branch of the GU, the Saltisford Canal Arm is encountered. The restored arm is close to the centre of Warwick, and is now a short branch of the Grand Union Canal, but was originally the mainline line of the Warwick and Birmingham Canalmarker, 1799, leading to the terminus and a basin complex built to originally handle timber. When the Warwick and Napton Canalmarker opened, this section was bypassed but served as the town's wharf area. The Saltisford Canal Trust have restored most of the surviving canal over the last 25 years, including major piling works and restoration of a warehouse in 2007. The last 150 metres were lost in the 1970s and are now built on except for a bridge now isolated in a car park. The restored section is now the mooring for narrowboats and a waterside park open to the public. Over 800 visiting narrowboats come by water to Warwick each year and moor on the arm.

On the Leicester Line there are two arms. One is a mile (1.6 km) long and leads to the village of Welfordmarker. The other leaves the main canal at the bottom of Foxton Locksmarker and runs 5 miles (8 km) to Market Harboroughmarker.

Current developments

Bedford & Milton Keynes Waterway

The Bedford and Milton Keynes Partnership (B&MK) plans to build a 15 mile canal connecting the Grand Union at Milton Keynesmarker to the River Great Ousemarker at Bedfordmarker at an estimated cost of £170m. The project is supported by British Waterways, the Bedford & Milton Keynes Waterway Trust, other waterways campaign groups, and also local councils. The first element of the canal was completed in 2009 and efforts are continuing to obtain funding to complete the scheme. The new waterway would create a new cruising ring connecting through from the Grand Union to the waterways of East Angliamarker which are beneficial to leisure cruising as boat hirers are able to take circular routes. The project was first discussed in 1810 when its promoters included Samuel Whitbread.

Popular culture

The Ocean Colour Scene song Mechanical Wonder is written about the Grand Union Canal.


Image:GrandUnion Canal 2.JPG|Wood bridge across the canalImage:GrandUnion Canal 4.JPG|Canal near NortholtImage:Grand-Union-Canal-near-Bugbrooke--by-Stephen-McKay.jpg|Canal near BugbrookeImage:Grand-Union-Canal-near-Nether-Heyford-by-Maurice-Pullin.jpg|Canal near Nether Heyford

See also

External links

New waterway external links

References and notes

  1. Canal Junction: The Grand Union Canal
  2. The spellings Bull's Bridge and Bulls Bridge are both used.
  3. Wendover Arm Trust
  4. Saltisford Canal Trust

Embed code:

Got something to say? Make a comment.
Your name
Your email address