By Jason Douglas and Matthew Cowley

LONDON--The U.K. economy expanded at a slightly faster annual rate in the second quarter than initially thought, according to official data Friday, boosted by a better performance from the construction sector.

The Office for National Statistics said the economy expanded 3.2% in the second quarter compared with a year earlier, the fastest annual pace of growth since the final quarter of 2007. An earlier estimate put the rate of growth at 3.1%.

The rise was driven by revisions to construction output, the ONS said. Construction output was 4.8% higher than a year earlier, according to the latest data, compared with an earlier estimate of 4.2%.

The U.K. is expected to be among the fastest-growing advanced economies this year. The Bank of England expects the economy to expand 3.5% in 2014 as a whole.

The ONS said the economy grew 0.8% in the three months to the end of June, an annualized rate of 3.4%. An earlier estimate put the annualized rate at 3.2%. The quarter-on-quarter growth rate was unchanged.

Unusually, Friday's report did not contain information on household consumption and other expenditure data because the ONS is in the midst of a major overhaul of how it calculates its figures to bring it into line with a new European standard. A new set of U.K. national accounts incorporating the changes will be published September 30.

Write to Jason Douglas at and Matthew Cowley at

(END) Dow Jones Newswires

August 15, 2014 04:52 ET (08:52 GMT)

Copyright (c) 2014 Dow Jones & Company, Inc.