Nash Mills Lock on Grand Union Canal

NASH MILLS LOCK ON GRAND UNION CANAL, RED LION LANE

Listed on the National Heritage List for England. Search over 400,000 listed places

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Overview

Heritage Category:
Listed Building
Grade:
II
List Entry Number:
1174062
Date first listed:
02-Dec-1986
List Entry Name:
Nash Mills Lock on Grand Union Canal
Statutory Address:
NASH MILLS LOCK ON GRAND UNION CANAL, RED LION LANE
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Location

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Archive image, may not represent current condition of site.
Date:
2001-07-25
Reference:
IOE01/03498/25
Rights:
© Mr Chris Skinner. Source: Historic England Archive

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Official list entry

Heritage Category:
Listed Building
Grade:
II
List Entry Number:
1174062
Date first listed:
02-Dec-1986
List Entry Name:
Nash Mills Lock on Grand Union Canal
Statutory Address 1:
NASH MILLS LOCK ON GRAND UNION CANAL, RED LION LANE

The scope of legal protection for listed buildings

This List entry helps identify the building designated at this address for its special architectural or historic interest.

Unless the List entry states otherwise, it includes both the structure itself and any object or structure fixed to it (whether inside or outside) as well as any object or structure within the curtilage of the building.

For these purposes, to be included within the curtilage of the building, the object or structure must have formed part of the land since before 1st July 1948.

Understanding list entries

Corrections and minor amendments

The scope of legal protection for listed buildings

This List entry helps identify the building designated at this address for its special architectural or historic interest.

Unless the List entry states otherwise, it includes both the structure itself and any object or structure fixed to it (whether inside or outside) as well as any object or structure within the curtilage of the building.

For these purposes, to be included within the curtilage of the building, the object or structure must have formed part of the land since before 1st July 1948.

Understanding list entries

Corrections and minor amendments

Location

Statutory Address:
NASH MILLS LOCK ON GRAND UNION CANAL, RED LION LANE

The building or site itself may lie within the boundary of more than one authority.

County:
Hertfordshire
District:
Dacorum (District Authority)
Parish:
Nash Mills
County:
Hertfordshire
District:
Dacorum (District Authority)
Parish:
Kings Langley
National Grid Reference:
TL 06880 04575

Details

KINGS LANGLEY RED LION LANE TL 00 SE (North side) 7/163 - Nash Mills Lock on Grand Union Canal

GV II

Canal Lock. Circa 1797 as a lock on the Grand Junction Canal Company (became Grand Union Canal by amalgamation 1929). Date 1877 on iron hinge of upper gate may mark repairs. Early C20 steps and revetment next lower gate. Brick and stone masonry basin with brown engineering brick steps and revetment next lower gate. Wooden gates with steel extensions to beams. Lock 88ft by 16ft to accommodate narrow boats in pairs. Gate and ground paddles to upper gates, gate paddles only to lower gates. (Branch Johnson (1970)118-20). The eastern half of the lock lies in Abbots Langley civil parish in Three Rivers District.

Listing NGR: TL0688004575

Legacy

The contents of this record have been generated from a legacy data system.

Legacy System number:
157694
Legacy System:
LBS

Sources

Books and journals
Branch Johnson, W, The Industrial Archaeology of Hertfordshire, (1970), 118-20

Legal

This building is listed under the Planning (Listed Buildings and Conservation Areas) Act 1990 as amended for its special architectural or historic interest.

Ordnance survey map of Nash Mills Lock on Grand Union Canal

Map

This map is for quick reference purposes only and may not be to scale. This copy shows the entry on 06-Jun-2026 at 08:25:17.

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© Crown copyright [and database rights] 2026. OS AC0000815036. Use of this mapping is subject to Terms and Conditions.

End of official list entry

All text content is available under the Open Government Licence v3.0 , except where otherwise stated. Any supplied maps are © Crown Copyright [and database rights] 2026 OS AC0000815036 and may not be reproduced without permission.

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