UK services PMI hits 2-yr high, GDP impact unclear

By David Milliken

LONDON (Reuters) - Britain's service sector had its best month since the start of the credit crunch in October, a purchasing managers survey showed on Wednesday, but economists were wary about how much would translate into official growth numbers.

The headline PMI index from the Chartered Institute of Purchasing and Supply/Markit survey rose to 56.9 from 55.3, its highest since August 2007 and the sixth successive month above the 50-level that separates growth from contraction.

The improvement beat expectations of a rise to 55.5, and sterling rose to a day's high against the dollar and a one-week high against the euro in response.

But while many economists treat the data as the best monthly proxy for UK services growth, recent strong performance has not matched the outturn of recent official data.

British GDP unexpectedly shrank 0.4 percent in the third quarter after a fall in services output that surprised economists given the PMI survey had reported activity growth throughout the period.

"We are putting less weight than usual on the PMIs, as recently they have diverged from official ONS data. And, contrary to what some commentators think, the PMIs do not actually directly measure growth in activity," said Colin Ellis, economist at Daiwa Securities.

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