LONDON, Dec 22 (Reuters) - Britain's economy grew by 0.1% in the July-to-September period of this year, the Office for National Statistics said on Monday, in line with its initial estimate.

Economists polled by Reuters had forecast the reading for gross domestic product would be unrevised.

Last week the Bank of England said it expected zero GDP growth in the October-to-December period but it thought that the underlying pace of economic growth was around 0.2% per quarter.

(Writing by William SchombergEditing by Sam Tabahriti)