Teachers, train drivers, civil servants, university lecturers, bus drivers and security guards from seven trade unions will walk out on Wednesday in what will be the biggest day of industrial action in over a decade.Protests will be held across the country on the same day against the Government’s controversial plans for a new law on minimum service levels during strikes.Unions have dubbed it the “anti-strike Bill”, saying it could lead to workers who vote legally to strike being sacked.PA