New surveys for PCS show cuts to jobs and increasing workloads are leading to more stress and ill health in the civil service.
PCS believes airline passenger safety could be put at risk as the airline industry's regulator plans to either scrap or sell off its medical services.
A large number of PCS marchers joined rallies for fair pay in London, Glasgow and Belfast on Saturday.
The UK's second largest energy supplier has become the first major company to be awarded the fair tax mark.
The £200,000 a year head of the civil service came under fire this week for claiming everyone had faced "difficult decisions" on pay.
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