Those pesky warcam gremlins could be about to strike London again. A month ago Transport for London's traffic cameras not very mysteriously at all went dark to coincide with a massive anti-war demo. Today we have another demo in London and, wouldn't you know it...

Actually quite a few of the cameras along the route are, at time of writing, still looking sprightly. But BBC Radio London already has it engineering message up: "Transport for London are currently doing maintenance on their camera network - this means there may be problems with the jam cams on BBC London's site. Apologies for the inconvenience." You can get a map of the route of the march here, and may care to busy yourself by checking the health status of the cameras along the way as the day goes by. You can do this here. Around noon GMT the Victoria Embankment camera was showing marchers on the south route, while Princes Circus also seems to indicate activity.

Cambridge Circus is sort of up, but starting to look decidedly unwell. Plus it's pointing along Charing Cross Road. So when you're applying the bandages, good TfL techies, could you train it along Shaftesbury Avenue instead please? Ta. And hurry up fixing Picadilly Circus, Trafalgar Square and Haymarket, will you? The signs of massing at Parliament Square and Picadilly (train this one east, please) are really quite tantalising. ®