The steel-hulled houseboat was travelling along the River Yare between Reedham and Great Yarmouth when it sunk suddenly.

The owner managed to escape to safety when it went down last month and specialist divers have been surveying the wreckage, located close to Polkey's Mill - a working drainage mill - this week.

The vessel sunk about two miles upstream from Reedham (Image: Holly Pamment)

The team hope to understand why it sunk and what will be required to raise the heavy vessel from the riverbed.

Officials have warned it could cost £50,000 due to the need for specialist crane equipment to cope with its weight.

It needs to be removed from the river as it is currently partly obstructing the channel, posing a hazard to passing boats.

READ MORE: The hidden menace ensnaring vessels on Norfolk's biggest broad

Divers investigate the wreck on the River Yare close to Polkey's Mill (Image: Owen Sennitt)

Officials fear the burden of the........

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