By Sara Sjolin and Carla Mozee, MarketWatch

LONDON (MarketWatch) -- The U.K.'s FTSE 100 index fell on Monday, extending losses into a fifth straight week.

The benchmark index dropped 0.9% to 6,255.49 after closing lower for a fourth straight week on Friday amid a wider rout in European markets. European stocks were also on the decline on Monday.

"Where markets go now is anyone's call, but it does seem as if the underlying volatility that had been elusive for some months is now back with us," said Tony Cross, market analyst at Trustnet Direct, in a note.

Only the sector registering gains was the consumer services group, with travel stocks pushing higher after a rough ride in recent sessions. Shares of InterContinental Hotel Group were up 3.8%, TUI Travel PLC rose 2.2% and British Airways parent International Consolidates Airlines picked up 1.6%.

Among major movers in London, shares of Petrofac Ltd. lost 2.7%. The oil-field-services provider leapt 7.3% on Friday saying it is on track to meet its full-year profit expectations.

Shares of Shire PLC fell 0.4% after the drug maker said its chief financial officer James Bowling is stepping down to join Severn Trent PLC .

In other developments, the automated system used to shift billions of pounds a day between banks was hit by a technical problem, resulting in the delay of U.K. purchases of houses and other big transactions. The glitch in the Real Time Gross Settlement Payment System is related to routine maintenance work, said the Bank of England on Monday. The "most important payments are being made manually," and all payments made Monday will be processed, the central bank said.

The outage of the RTGS affected the Clearing House Automated Payments System, or CHAPS, which handles large transactions including payments for house purchases. CHAPS in a separate statement said it's extending operational hours on Monday. CHAPS processed more than GBP70 trillion pounds ($113 trillion) last year.

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