Sheffield Liberal Democrat leader, councillor Penny Baker, has told Labour councillors they should get on with the job of serving the people and stop the current in-fighting. The comments come after six labour councillors resigned over the weekend from Sheffield City Council cabinet positions in a row over the way the authority is run. A public petition called for a switch to a committee system of decision-making could prompt a city-wide referendum. Baillor Jalloh reports for Sheffield Live!