TUC general secretary Brendan Barber has said the stubbornness of inflation, combined with poor wage growth, was putting real pressure on people's finances in the run up to Christmas.
Unison general secretary Dave Prentis added that the latest figures were the "lull before the storm", saying:
Big increases in energy prices are set to hit in the new year and the cost of feeding a family just keeps on going up. More than a million public sector workers have not had a pay rise for three years and the value of their take home pay just keeps on going down.
More top news
Given how dependent the rest of world is on China, it's $33 trillion debt could affect the UK - and here's why.
An Iraqi commander has said his forces have taken the al-Nuri Mosque compound in Mosul that was destroyed by the Islamic State last week.
The sister of one of the Hillsborough victims said her father made her promise to "get truth and justice" on his deathbed.