Hundreds of thousands of public sector workers have staged a 24-hour strike in protest at the government’s plans to make changes to their pensions.In England and Wales around 12,000 schools were either shut or partially closed as teachers went out on strike.At least 105,000 civil servants across the UK joined them causing disruption to some courts, ports, tax offices and job centres, though the unions claim the number who walked out was much higher.Nick Robinson reports.