30 June 2011
Last updated at 17:12
Lincoln’s Inn Fields is the starting point for a day of mass industrial action in central London by teachers and public sector workers.
Police officers lead the two-mile procession which winds along Aldwych, the Strand and into Whitehall.
Officers stop and search a man dressed in black and wearing a face mask.
Members from three teachers’ unions as well as the Public and Commercial Services union - which includes police support and UK border agency staff - take part.
Teachers are angry at plans they say will mean having to pay more into their pensions and working until age 68.
Marchers pass government buildings, including the Inland Revenue on the Strand.
The slow-moving crowds chant, blow whistles and horns and beat drums.
The route is lined with supporters, workers on their lunch break and intrigued tourists.
Outside Downing Street, protesters boo and direct their anger towards Number 10.
The procession passes the Houses of Parliament, ahead of an indoor and an outdoor rally.
More than 2,000 protesters gather in Westminster Central Hall to hear union leaders speak.
Police are estimating up to 20,000 joined the march.
The security operation is huge, but protesters say the march passed off peacefully.
As the rallies draw to a close, builders take a breather to watch the crowds disperse.
Scuffles are reported in Whitehall and at Charing Cross station, but most protesters lay down their placards and head home. Words by Marie Jackson with photographs by Phil Coomes.