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Hammersmith Bridge Vessel Transits

This Notice to Mariners (U3 of 2021) supersedes and replaces U2 of 2021

Please be aware that engineers will be carrying out works on the bridge from the 14th to 18th June from 0730 to 1700. During these period vessels will not be permitted to pass under the bridge.

London Borough of Hammersmith & Fulham Council (LBHF) are continuing with efforts to stabilise and repair Hammersmith Bridge. As part of these works new bridge control lights have been installed, which replace the orange navigational lights and the closed arch signs in the Centre Arch (No 2).

The bridge control lights display have three signals status’, namely: A Red X, an Amber X, and a Green arrow. The signals have the following meaning:

Red X

This means that the bridge is closed to all traffic. London VTS will also broadcast this information in its routine broadcasts on VHF Channel 14.

It is likely that a sensor alarm on the bridge has been activated therefore the bridge is closed to all traffic and an exclusion zone of 15 metres upriver and downriver of the bridge is in place.

Amber X

The centre Arch (No 2) may be used for pre-booked transit, which must be booked at least 72-hours in advance.

This is provided that the following conditions are met:

  1. The transit is essential and necessary. The requirement cannot be delayed to a later date or conducted elsewhere.
  2. The vessel’s Master accepts that the transit may be cancelled at short notice because of on-going investigations by LBHF. Re-booking a transit may be delayed indefinitely,
  3. The vessel’s Master conducts and holds on board a passage plan, which clearly identifies the hazards associated with passing underneath the bridge and identifies suitable abort points, and
  4. The Master confirms when booking that the safest minimum number of crew are onboard for the transit and no passengers are carried.


The vessel may proceed at its booked time if an Amber X is on display.

Any vessel approaching the bridge should abort its transit and await further instruction from London VTS, if the signal changes to a Red X.


Green Arrow

The bridge is open and there are no restrictions.

Arches No.1 and No. 3 – Closed to Navigation

Arches No. 1 and No. 3 are closed to navigation will be marked in accordance with the Port of London Authority Thames Byelaws 2012 as depicted and by night lit with three red lights in a downward triangle

All other enquiries regarding Hammersmith Bridge and the ongoing closure should be directed to:
Mr. Anvar Alizadeh
Highway Structure’s Manager
Tel. 020 87533303
Email: Bridges@lbhf.gov.uk