An offshore accommodation rig which went adrift in the North Sea with 33 people aboard is back under control.

The Safe Bristolia was being towed to Poland when it broke free 75 miles off the coast of Montrose on Monday morning.

The 588-bed platform used one of its two emergency anchors to stop it drifting on Monday night.

Norway-based owner Prosafe said there is no danger to North Sea installations and aims to get the Bristolia back under tow on Tuesday.

A spokeswoman for Norway-based Prosafe said: "The Safe Bristolia was being relocated when the towing line parted at 7.46am on Monday. The marine crew onboard are all accounted for and are preparing for the recovery operation."

The rig, which is usually secured to the ocean floor by eight mooring anchors, was built in 1983 and refitted as an accommodation facility in 2008.