Kings Reach - Dive Investigation Works & Arch Closures Cannon Street Rail Bridge

On or about 14th July 2025 contractors working on behalf of network rail will commence diving investigation and survey works at Cannon Street Rail Bridge. Diving operations will take place within the bridge arches and during the diving operations the arches will be closed to navigation. These works are expected to take place overnight and last up to 5 nights.  

To accommodate these works, the arches of Cannon Street Rail Bridge will be closed to navigation as follows: 

Arches closed to navigation will be marked in accordance with the Port of London Authority Thames Byelaws 2012 namely:

• By day, three red discs 0.6 metres in diameter at the points of an equilateral triangle with the apex downwards and the base horizontal 
• By night, three red lights in similar positions to the discs displayed by day. 

Requirements to proceed with caution or at slow speed will be made in accordance with the procedure set out in the Port of London Authority’s Port Information Guide, under ‘London VTS’, ‘Section 4’. 

The Dive Boat should display International Code Flags  ‘Alpha (A)’ as appropriate

Mariners transiting Cannon Street Rail Bridge are requested to pass with extreme caution. Mariners must ensure that wash and draw off are kept to a minimum when passing the site. 

A Safety Boat will be in attendance throughout these operations and will be maintaining a listening watch on VHF Channel 14.  

Further details will be broadcast by London VTS on VHF Channel 14.