The Office for National Statistics (ONS) has said UK gross domestic product (GDP) grew by 0.5% from July to September, confirming previous estimates.
According to the ONS, GDP was boosted by export growth, stronger consumer spending and an unexpected leap in business investment.
The results follow an estimate of 0.5% made at the end of October with a third estimate due in December.
On the year, growth was confirmed at 2.3%, in line with expectations and earlier estimates. Despite a 1% drop in Q2, exports were up 0.7% in the third quarter, while imports fell 1.5% despite a 1.3% jump in Q2.
Darren Morgan, an ONS statistician, said: "Investment by businesses held up well in the immediate aftermath of the EU referendum, though it is likely most of those investment decisions were taken before polling day,"
"That, coupled with growing consumer spending fuelled by rising household income, and a strong performance in the dominant service industries, kept the economy expanding broadly in line with its historic average."
Jonathan Chitty, investment analyst at Brown Shipley, said: "Today's GDP figures give no surprises, remaining in-line with the preliminary estimate. The 0.5% growth in output seen over the third quarter was entirely driven by the services sector, which makes up around 80% of UK economic activity, while all other areas of the economy declined over the period.
"Output is now 2.3% higher than a year ago - some commentators will see this as evidence Brexit fears were overdone. However, we are still some way off understanding the full impacts of Brexit and the OBR's GDP forecasts released this week show falling output may well be on the horizon."
Ruth Gregory, UK economist at Cpaital Economics, added: "The actual triggering of Article 50 next year could prompt further falls in business sentiment and investment.
"Moreover, the adverse impact of the pound's fall - in the form of the upward impact on inflation and corresponding squeeze on real incomes - has not yet been felt. But we suspect that importers and retailers will absorb some of the increase in imported costs, ensuring that the squeeze on household incomes is not too intense.
"And with ultra-accommodative monetary policy continuing to support spending and discourage saving, we don't think a sharp slowdown in spending is on the cards.
"So although we expect a bit of a slowdown from Q3's rate in the quarters ahead, we still think growth will beat expectations and forecast GDP to grow by 1.5% next year."
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