Protests outside Lib Dem conference
A massive police operation has been put in place as protesters gathered outside the Lib Dem's spring conference to oppose Government spending cuts and increased student fees.
Police defended their decision to deploy around 1,000 officers at the protest in the centre of Sheffield as an expected 10,000-strong demonstration failed to materialise.
South Yorkshire Police said between 3,000 to 5,000 people took part in the demonstration as Lib Dem delegates debated NHS reforms.
The force was braced for potential trouble and said it faced the biggest challenge since floods devastated parts of the county in 2007.
The protest was largely good natured, although there were a few minor scuffles and a flare was let off.
Despite the low numbers at the march, which started on Devonshire Green and ended on Barker's Pool, the police maintained a high visibility presence in the city centre.
Sheffield Commander Chief Superintendent Simon Torr said: "There will again be a large number of police officers throughout the city centre as the force can't take a chance on this event.
"We have been planning for this event for the past three to four months and we are pleased to be playing a part in hosting a major political conference in the county, to showcase Sheffield and prove what we can achieve together with our city centre partners."
A fringe meeting with Business Secretary Vince Cable was moved from a hotel outside the secure zone to a function room in Sheffield City Hall, and ministers were also apparently advised to avoid leaving the secure zone if possible.
South Yorkshire Police later confirmed that a 24-year-old man had been arrested for a public order offence and the discharge of a firework in a public place. He was given a £80 fixed penalty fine and released, a police spokeswoman said.