After a rally against cuts in London, a break away group caused a scuffle during a smaller demonstration outside the Savoy hotel.
The scuffle began after a protester took a doorman's hat. The top hat was later returned to him. No one is believed to have been seriously injured during the incident.
More top news
Nick Clegg will attempt to win over the female electorate when he kicks off the Liberal Democrats' general election campaign later today.
Up to £140 billion of savings could be released when over 55-year-olds are allowed to cash in their pension pots from April 6th.
The party's plans include a £2.5 billion Time to Care fund for the NHS, capping rail fare increases and 3,000 more midwives.