Signs of the protest are still evident in London The home secretary has “utterly condemned” the behaviour of thugs who attacked police officers and smashed property in London on Saturday.
Theresa May told the Commons she expected the number of people charged, currently 149, to increase.
She said she had asked the police whether they needed more powers.
A ban on known hooligans at marches was one option, she said, and she would review police powers to remove scarves covering protesters’ faces.
In the unrest which broke out alongside a peaceful anti-spending cuts protest, a mob attacked police officers, smashed windows and daubed banks and shops with paint.
A total of 201 arrests were made, most of them after a campaign group staged a sit-in at luxury store Fortnum and Mason on Piccadilly, in central London.
Mrs May said that since the student demonstrations in December, the Metropolitan police have been learning lessons and the tactics deployed on Saturday reflected that learning.
“But there is more that can be done,” she said. “I have asked the police whether they feel they need further powers to prevent violence before it occurs.
“I am willing to consider powers which would ban known hooligans from attending rallies and marches, and I will look into the powers the police already have to force the removal of face coverings and balaclavas.
“If the police need more help to do their work I will not hesitate in granting it to them.
“We will always back the police when they do their important work and we will back them as they do their job to bring these mindless thugs to justice,” Mrs May said.
“The message to those who carry out violence is ‘you will be caught and you will be punished’.”
Meanwhile, Metropolitan Police Assistant Commissioner Lynne Owens has called Saturday’s police operation a success because it minimised damage to property.
She told BBC home affairs correspondent Tom Symonds that during the late afternoon police used their powers to require protesters to remove face masks but often they put them back on later.
Ms Owens also said there was “chitter chatter” on the internet but no firm intelligence that protesters were planning to disrupt April’s royal wedding.
She said the police would “probably” request an order to allow officers to stop and search people on the street around the wedding, even without suspicion an offence had been committed, our correspondent said.
This would be permissible under Section 47a of the Terrorism Act 2000, used only in exceptional circumstances, when it was believed it was necessary to prevent terrorism, he added.
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