The general secretary and chief executive of the Royal College of Nursing has told ITV News that Chancellor George Osborne said it was "affordable" to give NHS staff a 1% pay rise in this year's spending review.
Dr Peter Carter added that the Government was "emotionally blackmailing hardworking staff".
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Two private citizens have already paid a "significant deposit" to take the week-long trip.
Slippy start tomorrow with frost & ice
The court will determine how much the UK government and travel firms knew about the risk of an attack on tourists holidaying in the area.