Twelve people have been arrested after hundreds of anti-establishment protesters gathered in Parliament Square in London on Bonfire Night, before scuffles broke out with police, Sky News reported.

Demonstrators wearing Guy Fawkes-style masks gathered at Trafalgar Square Friday evening and burned an effigy of UK Prime Minister Boris Johnson.

The protesters then moved to Parliament Square where fireworks appeared to be thrown towards police.

Many of the members of the movement, known as the Million Mask March, held signs protesting against coronavirus restrictions.

The London Metropolitan Police said eight officers had been injured.

"A total of 12 arrests were made while policing tonight's demonstrations across London," the force tweeted.

"Those arrests were for a variety of offences.

"Eight of our officers were injured. This is unacceptable.

"The policing operation will continue into the evening."