Thousands of anti-lockdown protesters marched through central London, with the prime minister's Downing Street residence and parliament both pelted with tennis balls.

England was meant to have lifted all restrictions on June 21, but a rise in cases due to the emergence of the Delta variant, first identified in India, has pushed those plans back by at least four weeks.

The throng marched from Hyde Park, through Oxford Street and towards parliament, carrying flags, whistling and shouting as they demanded an immediate end to restrictions.

“The main reason I'm here is because I feel this lockdown has come at the cost of our liberty and rights,” said Iain McCausland, who had travelled from Devon on England's southwest coast.