Britain's economy growth between July and September 2012 has been revised down from 1% to 0.9%, accord to official statistics.
The office for national statistics GDP figures, released on Friday morning, also revealed production output, manufacturing output, service industries, household consumption and employee pay had all also been revised down from the previous estimates.
Howard Archer, of IHS global insight, said the downgrade did not "fundamentally change the picture."
"UK GDP was actually flat year-on-year in the third quarter rather than contracted by 0.1% as previously reported," he said.
"The modest revisions to the GDP data do not fundamentally change the story of an economy that is likely to have been essentially flat overall in 2012, with the quarterly performances distorted since the second quarter by a number of factors, notably including the Queen’s Diamond Jubilee and the Olympics.
"Third quarter GDP growth of 0.9% quarter-on-quarter was clearly boosted by the Olympics and was also lifted substantially by the making up of some of the activity lost in the second quarter to the Queen’s Diamond Jubilee holiday."
It also emerged that public sector net borrowing, excluding financial interventions such as bank bailouts, rose at £17.5bn in November, up £1.2bn on the same month last year.
Economists had predicted borrowing would fall slightly to around £16 billion.