A wave of strikes are to be launched by thousands of workers this week, hitting rail, post and airline industries in the run-up to Christmas.
A series of disputes have arisen over issues including jobs, pay, pensions and safety involving some of the country's biggest trade unions.
However, officials dismissed any suggestions that the strikes were co-ordinated or part of a conspiracy to bring down the Government.
Members of the RMT union at Southern Rail are on strike during both today and Tuesday in the long-running dispute over the role of conductors.
This runs alongside a continued ban on overtime by drivers who are members of Aslef, causing yet more chaos for Southern's 300,000 passengers.
Members of the Communication Workers Union will strike for five days, including Christmas Eve, in protest at job losses, the closure of a final salary pension scheme and the franchising of Crown Post Offices.
British Airways cabin crew in the Unite union are also due to strike on Christmas Day and Boxing Day in a row over pay. However, talks aimed at resolving the dispute have been held at Acas today, and BA has said it is "making sure" the action doesn't happen.
Unite members employed by Swissport as baggage handlers and other ground staff at 18 airports are set to walk out on Friday and Saturday over pay, unless talks on Tuesday at the conciliation service bring a deal.