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Britain faces its biggest day of industrial action in more than a decade tomorrow as seven unions plan to strike.

On Wednesday, schools will close across the country in what is becoming a de facto general strike as train drivers, civil servants, airport and university workers join teachers in strike action.

According to the Congress of Trade Unions, 500,000 workers will strike in seven unions in the biggest day of industrial action in more than a decade.

The combined action comes after talks between the government and the National Education Union (NEU) to prevent strikes broke down on Monday and more than 12,000 schools are expected to be fully or partially closed as a result.

The drivers will take part in the new strike tomorrow, with drivers from the Aslef union and the wider rail union RMT planning walkouts on February 1 and 3.

The Rail Delivery Group, the body that represents rail firms, said only around 37 per cent of rail services were expected to run, with no trains in some parts of the country.

Airports will be affected as fliers have been told to expect longer waiting times as Border Force officers are expected to join the action.

They represent about 10 percent of the 100,000 state employees who will strike on February 1.

Phil Douglas, director-general of the Border Force, speaking at an aviation conference in central London, said: “Everyone is out.

“All members of the PCS (Public and Commercial Services Union) will be on strike tomorrow.

“But we’ve been planning this for weeks and months.

“Of course there will be some disruption and queues.”

He added: “I am not ruling out further strike action. The union has a mandate until May.”

Further action is planned for the coming weeks as thousands of Unison ambulance staff, across five services in England, go on strike on February 10, the union has announced.

Amid an increasingly bitter impasse over public sector pay, Rishi Sunak said on Monday he would like to “wave a magic wand” to increase NHS wages, but the government needs to get inflation under control, which means being responsible for borrowing.

The Prime Minister suggested that the wage increase could trigger a “vicious cycle” of inflation or higher taxes.

“Where we are with taxes right now, we can’t raise them any more, right, and we have to lower them,” he said.