“The group of local activists from different parts of the UK visited the palace as tourists, before standing in the Grand Hall,” Britain’s largest anti-monarchist group, Republic, said in a statement.
The group released a photo where protesters can be seen standing inside the palace wearing T-shirts that spelled out “Not My King”.
“The protest is the latest in a series of actions aimed at pushing forward the debate about the future of the monarchy,” Republic said in a statement.
The group said six of the activists involved were briefly detained by security, before being escorted out of the front gate.
The life of King Charles III in pictures
Read Related Also: Staten Island’s secession call: Letters to the Editor — Sept. 2, 2023
Buckingham Palace told CNN that it doesn’t comment on security matters.
CNN has reached out to London’s Metropolitan Police for comment.
The organisers described the protest as a “fantastic statement of intent, citizens standing up in the home of the monarchy to declare their opposition to hereditary power”.
“Republic will continue to protest against the monarchy up and down the country, with the next protest set for the state opening of parliament on November 7,” Smith added.
The group was also involved in organising anti-monarchy protests around King Charles’ coronation ceremony earlier this year.