Unison General secretary Dave Prentis (centre) joins public sector workers and members of Unison as they gather outside the Houses of Parliament in central London during the one-day walkout as part of bitter disputes over pay, pensions, jobs and spending cuts. PRESS ASSOCIATION Photo. Picture date: Thursday July 10, 2014. Schools across England and Wales were facing closures and disruption today as teachers joined other public sector workers for a national strike. In total, more than a million people were taking part in the one-day walkout. The action has been hailed as the biggest strike over pay to hit the Government since it came to power in 2010. See PA story INDUSTRY Strike. Photo credit should read: Nick Ansell/PA Wire