"Roland Perry" wrote in message
...
In message , Richard J.
writes


The Thames bridges also have "traffic lights" for vessels, so this is
actually a SPAD as well!
--
Roland Perry

Sort of - see the 'Tower Bridge Signals' PLA diagrams showing Bridge Lights
lower down the page he

http://www.portoflondon.co.uk/displa...&site=maritime

Colin