Figures due out later are expected to confirm that the UK came out of recession in the final quarter of 2009.
The UK economy has come out of recession, after figures showed the economy had grown by 0.1% in the last three months of 2009.
The economy has contracted for a record six consecutive quarters, but signs of recovery have started to emerge.
The economy had previously contracted for six consecutive quarters - the longest period since quarterly figures were first recorded in 1955.
Last week, it was revealed that unemployment in the UK fell for the first time in 18 months.
There have been recent recovery signs - last week UK unemployment fell for the first time in 18 months.
The UK is one of the last major economies still in recession. Europe's two biggest economies - Germany and France - came out of it last summer.
The UK's had been one of the last major economies still in recession.
The UK recession began in the April-June quarter of 2008. Since then the economy has contracted by 6%.
Europe's two biggest economies - Germany and France - came out of recession last summer. Japan and the US also exited recession last year.
The Office for National Statistics (ONS) will release the latest gross domestic product (GDP) figures - for the final three months of 2009 - at 0930 GMT.
The UK recession began in the April-to-June quarter of 2008.
'Room for surprises'
During 18 months of recession, public borrowing increased to an estimated £178bn, while output slumped by 6%.
Many economists expected the UK to have emerged from recession in the third quarter of 2009, and were taken by surprise by the 0.4% contraction first estimated by the ONS, later revised up to a 0.2% contraction.
First estimates of how the economy has performed are made with about 40% of the data available, and Investec economist David Page has warned there is "plenty of room for surprises" in the figures.
First estimates of how the economy has performed are made with only about 40% of the data available.
HAVE YOUR SAYHow can we possibly say we are out of recession when we have printed 200 billion and borrowed 178 billion?NP, Cornwall Send us your comments
Investec economist David Page said there was "plenty of room for surprises" in the figures.
"Official GDP estimates have been significantly revised in recent quarters," he said.
"The last time a first estimate of GDP was left subsequently unrevised was the first quarter of 2007."
Treasury minister Lord Myners told BBC Radio 4's PM programme that there were still "some difficult decisions to be made around balancing the economy".
When asked if recovery can be maintained at a time of huge cuts in public spending, he said: "We have a strategy for growth going forward, as growth will play an important part in reducing the deficit.
"At the same time, we acknowledge that decisions will have to be made about public expenditure."
