Tens of thousands of people took to the streets of London on Saturday to protest against the government’s plan to repair the country’s public finances.
Unions said at least 200,000 were present. London’s Metropolitan Police declined to comment on the figure.
The march was largely peaceful but a smaller group of demonstrators broke away, smashing shop windows and throwing paint bombs.
Ministers say agressive cuts are needed to reduce Britain’s fiscal deficit of 166 million euros, which they blame on the previous Labour government.
They include cutting 300,000 public sector jobs and freezing civil service pay.
Critics say the cuts will only slow economic growth, eventually leading to lower tax revenues and making it harder to close the deficit.