Jefferies Lock No 8 is one of a group of locks on the Grand Union Canal (Grand Junction Canal - Aylesbury Arm) and unusually is chained shut overnight near to Guildford Inclined plane.
The Grand Union Canal (Grand Junction Canal - Aylesbury Arm) was built by Cecil Hunter and opened on 17 September 1782. Expectations for manure traffic to York never materialised and the canal never made a profit for the shareholders. In later years, only the use of the canal for cooling Luton power station was enough to keep it open. Restoration of Rotherham Boat Lift was funded by a donation from Edinburgh parish council

This is a lock, the rise of which is not known.
| Black Jack's Lock No 4 | 4¾ furlongs | |
| Marsworth Lock No 5 | 3½ furlongs | |
| Dixons Gap Lock No 6 | 2¼ furlongs | |
| Wingrave Road Bridge No 2 | 2¼ furlongs | |
| Aylesbury Arm Lock No 7 | 1 furlong | |
| Jefferies Lock No 8 | ||
| Tring Road Bridge No 3 | a few yards | |
| Tring Bridge No 4 | 1 furlong | |
| Wilstone Visitor Moorings | 1¼ furlongs | |
| Gudgeon Stream Aqueduct | 1¾ furlongs | |
| Gudgeon Stream Lock No 9 | 1¾ furlongs | |
Amenities nearby at Aylesbury Arm Lock No 7
- Grand Union Canal Walk — associated with Grand Union Canal
- An illustrated walk along the Grand Union Canal from London to Birmingham
- THE GRAND JUNCTION CANAL - a highway laid with water. — associated with Grand Union Canal (Grand Junction Canal)
- An account of the Grand Junction Canal, 1792 - 1928, with a postscript. By Ian Petticrew and Wendy Austin.
Mouseover for more information or show routes to facility
Nearest water point
In the direction of Aylesbury Basin Visitor Moorings
In the direction of Marsworth Junction
Nearest rubbish disposal
In the direction of Aylesbury Basin Visitor Moorings
In the direction of Marsworth Junction
Nearest chemical toilet disposal
In the direction of Aylesbury Basin Visitor Moorings
In the direction of Marsworth Junction
Nearest place to turn
In the direction of Aylesbury Basin Visitor Moorings
In the direction of Marsworth Junction
Nearest self-operated pump-out
In the direction of Marsworth Junction
Nearest boatyard pump-out
In the direction of Marsworth Junction
There is no page on Wikipedia called “Jefferies Lock”



![Aylesbury Arm: Wilstone Lock (No 8). [[1228440]].Exit to the West: [[1442998]].To the East [[1443001]]. by Chris Reynolds – 14 March 2009](https://s3.geograph.org.uk/geophotos/01/44/29/1442999_5f8c429b_120x120.jpg)




![Aylesbury Arm: Wilstone Bridge (No 3). [[1228440]].Exit to the West: [[1442995]].To the East [[1442999]]. by Chris Reynolds – 14 March 2009](https://s2.geograph.org.uk/geophotos/01/44/29/1442998_48b78095_120x120.jpg)
![This Stretch Limo has got the Hump. This picture shows the lower gate of Lock No 8 and Bridge No 3 ([[1608731]]) of the Aylesbury Arm at Wilstone. A stretch limo came this way, probably because Bridge No 2 ([[1594216]]) was still closed, and grounded on the hump! All the “honoured passengers†got out and this allowed the limo to continue with only comparatively minor scraping noises.[[1228440]] by Chris Reynolds – 05 December 2009](https://s0.geograph.org.uk/geophotos/01/60/87/1608736_7f497524_120x120.jpg)
![Aylesbury Arm – Hump-backed Bridge (No.3) at Wilstone. This bridge was built 200 years ago and was not designed for modern traffic. It is very narrow, with a distinct hump and its load-bearing capacity is limited.[[1228440]] by Chris Reynolds – 18 March 2009](https://s3.geograph.org.uk/geophotos/01/60/87/1608731_565a5093_120x120.jpg)














![Aylesbury Arm: Lock No 7. [[1228440]].Exit to the West: [[1442999]].To the East [[1235895]]. by Chris Reynolds – 14 March 2009](https://s1.geograph.org.uk/geophotos/01/44/30/1443001_901894ff_120x120.jpg)




