Anyone attempting to disrupt the royal wedding on Friday will face a "robust" response, the Metropolitan Police has said.
Some 5,000 officers will be on duty to ensure the Royal Wedding of Prince William and Kate Middleton is a "safe, secure and happy event".
Commander Christine Jones, who will be overseeing the police operation, said there was no specific known threat. However 60 known troublemakers have been banned from London on the day.
"We would be wrong not to consider spontaneous protest as part of our contingency planning. But let us make it absolutely clear - this is a day of celebration, joy and pageantry. It is a fantastic day for Britain," she said.
Some 5,000 officers will be on duty to ensure the Royal Wedding of Prince William and Kate Middleton is a "safe, secure and happy event".
Commander Christine Jones, who will be overseeing the police operation, said there was no specific known threat. However 60 known troublemakers have been banned from London on the day.
"We would be wrong not to consider spontaneous protest as part of our contingency planning. But let us make it absolutely clear - this is a day of celebration, joy and pageantry. It is a fantastic day for Britain," she said.
"Any criminals attempting to disrupt it, be that in the guise of protest or otherwise, will be met by a robust, decisive, flexible and proportionate policing response."
Assistant Commander Lynne Owens added that although plans were in place to deal with any disruptions, police cannot ban demonstrations from taking place in the capital.
She confirmed that Muslims Against Crusades had planned to protest outside Westminster Abbey and were due to meet with police last week to discuss conditions but had failed to turn up.