TEACHERS at a “chaotic” free school have unanimously voted for strikes after a stressed-out teacher collapsed during a class and paramedics had to be called.

Staff at Stem Tech City Academy in Islington, north London, announced on Monday that they would stage five days of industrial action in the run-up to the Christmas break.

Senior managers put “excessive pressure” on staff to make improvements, which also resulted in a teacher being called late on a Sunday night with “instructions” for the next day’s inspection.