Syon Reach - Hazard to Navigation Partially Submerged Tree

Mariners are advised that a HAZARD TO NAVIGATION has been identified on the south channel edge of Syon Reach, in vicinity of Brentford Dock Entrance. The approximate position is indicated by the red circle on the chartlet below:

A large tree as pictured below, lies on the south channel edge and within the authorised channel. This tree is visible at low water however will be partially submerged or fully submerged by the tide. A small orange unlit buoy, has been attached to mark the position. 

Mariners are advised to navigate this area with extreme caution and report any difference in position to London VTS. 

Additional information may be broadcasted by London VTS on VHF Channel 14.