The Government said it was "disappointing" that the PCS union is planning three months of industrial action, including a huge strike on Budget day.
A Cabinet Office spokesman said: "It is disappointing that, yet again, the PCS insist on pushing for futile action which benefits no-one, and damages the services they deliver to the public."
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The health service receives more than 10,000 new claims for compensation every year.
Some sunshine too for eastern Scotland and northeast England.
The royal had earlier attended a UK-Africa summit in London.