A large swathe of central London will be closed to road traffic for 19 hours on 29 April for the Royal Wedding between Prince William and Kate Middleton.
Roads between Lambeth Bridge and Waterloo Bridge to the south and as far north as Piccadilly and the Strand will be closed from 4am, and police hope to have roads re-opened by 11pm. Depending on crowds and the time taken to remove security barriers, that time may be revised.
If crowds are larger than expected, contingency plans have been put in place to close roads further west to Vauxhall Bridge, and north to Piccadilly Circus, as well as closing Knightsbridge east of Knightsbridge Station and Edgware Road up to the junction with Marylebone Road.
The Met Police's map of the closures
The downside of the wedding is that the cycle route between the Mall and Constitution Hill, behind the Canada Gate, is currently blocked by the media circus.