Cunard Line has been forced to cancel a cruise of the 2007 built Queen Victoria after the ship suffered mechanical failure earlier this week, the BBC reports. “Part of the ship's propulsion system failed on Monday, meaning it was forced to sail at speeds 10% lower than usual,” the report said.

Cunard said there was no danger to the passengers or crew on the Southampton-based liner, currently off Portugal. It said the next voyage would go ahead on Thursday but an Adriatic cruise in October has been cancelled while the ship is repaired at Lloyd Werft in Bremerhaven.

A Cunard spokeswoman told the BBC there had only been "minor port timing changes" to the ship's Mediterranean current cruise schedule following the failure. Passengers due to depart on the cancelled 16-night Adriatic voyage from Southampton have been offered refunds or transfers to other cruises. Cunard said the cancellation was "regrettable but unavoidable.” The ship will re-enter service on 17 October.