Alarm bells were sounded over inflation today as the headline rate surged above the Bank of England's target.
The CPI index hit 2.1 per cent in May, up from 1.5 per cent the previous month and above the official 2 per cent goal.
The jump was significantly above the expectations of analysts, who had forecast a 1.8 per cent level.
It comes amid increasing concern that the UK economy - along with the US - is overheating as it bounces back strongly from the pandemic.
The Bank of England has insisted that the inflationary pressure will be temporary.
But a former top civil servant at the Treasury warned that the Bank was risking having to raise interest rates 'mush higher' in future by refusing to act now to stop the economy overheating.
The CPI index hit 2.1 per cent in May, up from 1.5 per cent the previous month and above the official 2 per cent goal
'Monetary policy is excessively loose. By rejecting the 'stitch in time' policy of Eddie George and Mervyn King, the Bank risks having to raise interest rates much higher later,' Lord Macpherson tweeted.
The inflation spike was partly down to higher fuel prices and more expensive clothing.
ONS chief economist Grant Fitzner said: 'The rate of inflation rose again in May and is now above 2 per cent for the first time since the summer of 2019.
'This month's rise was led by fuel prices, which fell this time last year but have jumped this year, thanks to rising crude prices.
'Clothing prices also added upward pressure as the amount of discounting fell in May.'
The inflation spike was partly down to higher fuel prices and more expensive clothing
Meanwhile, the impact of the pandemic is putting fresh strain on the public finances.
The state pension could see a record rise due to the way the crisis has warped wage changes and the Boris Johnson's 'triple lock' pledge.
That policy means the level increases every year in line with whichever is highest out of inflation, average wage growth, or 2.5 per cent.
Average weekly wages rose by 8.4 per cent in the 12 months to April, according to figures from the ONS.
That was because earnings were depressed during Covid lockdowns last spring and rose when millions returned to work.
Under the terms of the triple lock, an 8.4 per cent increase in the state pension next year would add over £7billion more to state spending, whereas a regular 2.5 per cent increase would cost only £2.1billion.
Pensioners received the default 2.5 per cent increase this April.
Nigel Mills, Tory chairman of the all-party parliamentary group on pensions told the Daily Telegraph: 'The triple lock wasn't meant to be based on artificially out-of-line earnings data.'
He said the spirit of the 2019 manifesto promise could be kept by calculating a two-year average of earnings data.
The triple lock was introduced under the coalition in 2011 and has been continued by successive Conservative governments.
Boris Johnson recommitted to the triple lock during the 2019 general election.
It is understood ministers have not yet discussed any changes to the triple lock.
A final verdict of the state pensions upraising will be taken at the annual review in November.