Grand Union Canal – Navigation Closure Update
Locks 42, 43 and 44 - Marsworth Flight
Published: 8 January 2026
Details
Programme: Winter works
Type: Navigation Closure
Waterway(s): Grand Union Canal
From: 6 January 2026, 1pm
To: 13 March 2026, 4pm inclusive
Region: London and South East
Reason: Repair
Location
Closest waterway: Grand Union Canal
Starts at: Lock 42
Ends at: Lock 44
Upstream winding hole: Bulbourne
Downstream winding hole: Marsworth Junction
Descriptions
Update 7 January 2026, 11:38am
Please be advised that the towpath will no longer be closed during these works.
Original 7 May 2025, 11:06pm
This navigation and towpath closure encompasses three pieces of work. We will be doing a top & bottom gate replacement on lock 42, bottom gate replacement on lock 43 and bottom gate replacement and repairs to the top gate of lock 44.
Information
You can view this notice and its map online here:
https://canalrivertrust.org.uk/notices/0196acc5-0382-7d1c-9f08-07596f859d72
You can find all notices at the url below:
https://canalrivertrust.org.uk/notices