Tens of thousands of people marched through central London on Saturday in two separate protests – one against high levels of immigration and another in support of Palestinians.
Police deployed 4,000 officers, including reinforcements from outside the capital, and pledged “the most assertive possible use of our powers” in what they called their biggest public order operation in years.
Shortly after both marches started, police said they had made 11 arrests for a range of offences. They had earlier forecast turnout of at least 80,000.