Royal well-wishers will be able to watch the Diamond Jubilee Water Pageant from a number of London Bridges.
A 1,000-strong flotilla of boats will sail down the River Thames from Putney Bridge to Twoer Bridge to celebrate the Queen's 60 years on the throne.
WATCH FROM: Lambeth, Westminster and Blackfriars Bridges will all be open with spectators undergoing bag searches.
PEDESTRIAN ACCESS ONLY: Battersea and Chelsea bridges will be open for pedestrians to cross but they will not be permitted to stop and watch.
AVOID: Organisers have urged visitors to avoid Tower Bridge as it will be raised in a tribute to the Queen.
CLOSED: Vauxhall, Waterloo, Southwark and London bridges will all close during the pageant.
The flotilla will go past the bridges at the following times:
Battersea Bridge: 2:25pm
Albert Bridge: 2:45pm
Chelsea Bridge: 3:00pm
Vauxhall Bridge: 3:10pm
Westminster Bridge: 3:25pm
Waterloo Bridge: 3:30pm
Blackfriars Bridge: 3:40pm
Southwark Bridge: 3:45pm
London Bridge: 3:50pm
Tower Bridge: 4:00pm
The Queen and senior royals will leave Chelsea Harbour on the barge of the Royal Yacht Britannia, and board the newly converted royal barge at Cadogan Pier at 2.30pm, with the flotilla formally getting under way at 2.40pm.
It will be led by a floating belfry of eight bells named after the royals, with peals being answered by local churches. There will be 10 musical barges, with an orchestra playing James Bond themes as it passes the MI6 building.