Union officials said the Government was planning to attack hours, holidays, sick pay and flexible arrangements under a review of working conditions announced last year.
PCS general secretary Mark Serwotka said the lives of civil and public servants were being made more difficult by cuts.
More top news
Some of the key players have praised her landmark speech - but critics say it is too light on detail and time is running out to sign a deal.
A comparatively quiet reception greeted the launch of the new iPhone 8 and 8 Plus - a far cry from the crowds of years gone by.
Footage shows the dangerous rescue effort after the family were left at the mercy of the sea on a boat overturned by Hurricane Maria.