London firefighters spent more than nine hours trying to rescue The Wyndham after the party boat began sinking on the River Thames.

An investigation has been launched by Thames Boats Ltd after one of its party boats, The Wyndham began sinking on the River Thames.

No one was on board at the time of the incident.

The chairman and managing director of the company, Nigel Scandrett told YBW that The Wyndham, like all the firm’s boats, has an excellent safety record.

“There was no reason to think she was nothing else but safe and sound,” he said, adding that all the correct paperwork for the vessel is in place.

Scandrett speculated that the boat could have been hit by a large piece of river debris, and stressed that just as with any incident of this nature, an investigation would be carried out.

The Wyndham has been pumped out and is now stabilised on a mooring close to Tower Bridge.

The London Fire Brigade was called out to the sinking vessel in the early hours of the 14 October, 2016.

In a media statement issued on Friday, the authority said: “Firefighters were called to a boat sinking on the River Thames close to London Bridge in the early hours of this morning.”

“A 40 tonne boat was taking on water and sunk to a depth of two metres. Thankfully there was nobody on board the vessel,” it continued.

“The Brigade’s fire boat was called to pump water from the vessel and crews assisted with securing the boat to a mooring barge. The Port of London Authority was also in attendance.”

“The Brigade was called at 0401 and the incident was over for us at 1333. Crews from Lambeth River and Euston fire station stations attended the scene,” it concluded.

The Wyndham, which is a catamaran, is described on the Thames Boats Ltd website as a “smart, modern Thames party boat” available for private hire in London.

The party boat had a compete restoration and refurbishment in 2009, before being relaunched in 2015.

It is licensed for up to 120 people and costs from £220 per hour to hire.