More on the Corriere della Sera interview with Giovanni Costantino. He says the idea that the ship disappeared in a few seconds is "nonsense".

Instead, Costantino claims six minutes passed from the moment water entered the ship to the moment it sank.

In this time, the yacht took on water with guests still in their cabins. They should have been taken to the assembly point of the ship "as per emergency procedure", he says.

"All it took was a 40-degree tilt and those in the cabin found the door high up," he says, leaving them trapped.

To have avoided sinking, he says, the hull of the ship and its deck should have been covered by closing up all the doors and hatches on board.

"Then start the engines and pull up the anchor," he adds, before putting the bow "to the wind" and sending down the keel - the bottommost part of the boat.

Costantino believes had this happened, "the next morning, they would have set off again with zero damage".

Some more now from friend of Mike Lynch and lastminute.com founder Brent Hoberman.

Speaking of Lynch's legacy, Hoberman says: "In the UK lots of people complain that we don't get scientists and technology in IP that is commercialised at scale.

"Mike was able to do this from the very early years ... and then repeat it and repeat it at scale."

Lynch founded Autonomy in around 1996.

Darktrace, in cybersecurity, was the following company that "wouldn't exist without him".

"[Darktrace] was recently taken private for around $5bn," Hoberman says.

Another company Luminance - a legal tech company - is "also doing very well".

"He's an instrumental figurehead from the Cambridge technology scene leading the path forward for UK entrepreneurs to commercialise their inventions at a global scale," Hoberman says.

Brent Hoberman, the founder of lastminute.com and a friend of Mike Lynch, tells the BBC Lynch's friends had "hoped for a miracle... sadly it seems we haven't had a miracle".

Speaking on the BBC News channel, he says, "It's very tragic and the timing is of a Shakespearean era tragedy."

"He had just worked hard to clear his name for the last 12 years and was on a celebratory cruise with the people who supported him so much through that really tough time."

Hoberman says, "We should re-emphasise winning against all odds that trial against him in the US".

He adds that Lynch "inspire[d] loyalty" and although Hoberman did not speak specifically with him about this trip, it was clear it was a "celebratory trip with his key team" and "he wanted to pay back that loyalty by having a celebration".

Nadia Ragozhina
Live page editor

As we've been reporting, multiple reports suggest the body of British tech entrepreneur Mike Lynch has been recovered from the sunken yacht.

We know that five out of six missing bodies have been recovered, but according to Italian law, officials are not allowed to share the names of the deceased until formal identification has concluded.

As part of that process, the bodies must be identified by a family member, or a person close to the victim, before the deaths can be officially certified. That process remains ongoing.

This means that until there is official confirmation, or we hear from the Lynch family that they have been informed officially of any deaths, the BBC is not able to report the names of the victims whose bodies have been brought back to shore.

One body - that of Recaldo Thomas, the yacht's chef - was recovered from the sea on Monday.

Image source, Mateo Brenninkmeijer

"Everything that was done reveals a very long list of errors," according to Giovanni Costantino, CEO of The Italian Sea Group, which owns Perini Navi - the company who built the Bayesian.

He tells Italian newspaper Corriere della Sera:

• the yacht shouldn't have been at anchor
• the stern hatch was clearly open
• the ship's keel - the blade sticking into the water from underneath - should have been lowered
• people shouldn't have been in the cabins
• the crew should have known about the incoming storm

"Ask yourself," he says. "Why were no fishermen from Porticello out that night? A fisherman reads the weather conditions and a ship doesn't?

"The storm was in all the weather charts. It couldn't have been ignored."

Costantino says the sinking could have been avoided. It is good practice, he says, to have a guard on the bridge when a ship is anchored.

A guard would have seen the storm coming and the necessary measures would have been taken, he adds.

'I knew that I shouldn’t be out there that night'published at 12:33 British Summer Time 22 August

12:33 BST 22 August

By Daniele Palumbo, in Porticello

You need to get up very early to catch the fishermen of Porticello. At 5:30 this morning, I found them hard at work unloading at the fish market.

“I’m not a captain of a big luxury yacht, I’m just a fisherman and I knew that I shouldn’t be out there that night,” says Antonio.

“We all knew that a storm was coming and that during that night it was better to keep the boats inside the port. We all know each other, and we were saying this among ourselves.”

I’m on the hunt to see if anyone has video footage of the night of the storm – perhaps from the fishing boats in the port, and I ask if anyone has a security camera on board.

Some do, but the ones I find are pointing to the fishing deck and not the stormy seas on that night.

“I never thought to put a camera on my boat. Maybe I should now,” says a fisherman showing me around.

“There’s so much interest in what happened, there are photographers and cameras everywhere now.”

Image source, Reuters

Tributes have been coming in for tech entrepreneur Mike Lynch as reports emerge that all the men who were missing from the yacht have been found.

Lynch was a "human being of great ability" according to chairman of the Francis Crick Institute Lord John Browne.

Lynch had been part of a fundraising board, established by Cancer Research UK, which contributed to the building of the institute, itself a registered charity working in biomedical research.

Browne says: "His ideas and his personal vision were a powerful contribution to science and technology in both Britain and globally."

For technology industry group TechUK, Lynch was a "hugely significant and pioneering figure" within the sector.

While the Royal Academy of Engineering, for which Lynch had been a donor and former council member, says today: "Mike became a fellow of the Royal Academy of Engineering in 2008 and we have fond memories of the active role he played in the past as a mentor, donor and former council member.

"He was also one of the inaugural members on the enterprise committee.

"Our thoughts are with his family and friends at this time."

We expect to be hearing more about Mike Lynch's life and contributions as well as those of the other victims throughout the day - we'll keep you updated here.

We're hearing a little more now from Italian Coastguard Vincenzo Zagarola who indicates that a decision on whether to raise the yacht to the surface is "not on the agenda" at the moment, but it will be at some point in the future.

He tells the PA news agency: "This is not a topic on the agenda. It will be, but not now."

He adds that the coastguard's current theory is that the woman who remains missing is inside the boat.

As we've been reporting, a source has told Reuters news agency that Mike Lynch's 18-year-old daughter Hannah is still missing.

Matt Taylor
BBC Weather

Witnesses describe seeing a waterspout form during the storm before the Bayesian yacht sank.

Most of us are aware of what tornadoes are - rotating columns of destructive winds, protruding from the base of clouds down to the ground.

Waterspouts are just that too, but are over water rather than land. Instead of dust and debris swirling around the core of strong winds, it’s water mist whipped up from the surface.

Like tornadoes, most are only short-lived, narrow columns and are not easily picked out on weather radars, so many will go unreported.

However, they are not as rare as you may think. According to the International Centre for Waterspout Research, there were 18 confirmed waterspouts off the coast of Italy on 19 August (the day the yacht went down) alone.

In the northern hemisphere, waterspouts are most common in late summer and through the autumn, when sea temperatures are at their highest, fuelling the storm clouds. But with sea temperatures rising due to climate change, there is a concern that they could become more common.

In the last week, the Mediterranean has registered its highest sea surface temperature on record, which has helped to energise this recent storm outbreak.

Seeking clues to what happened the night the Bayesian sankpublished at 11:47 British Summer Time 22 August

11:47 BST 22 August

By Daniele Palumbo, in Porticello

I've come to Porticello to try to locate CCTV footage from cafes, shops and residents that might provide further clues about the night the luxury yacht capsized and sank.

Speaking to local residents, it’s clear the events have hit this normally sleepy fishing village hard.

“We have never seen so many foreigners,” says Salvatore, busy playing cards with his friends.

“Naturally we are shocked by what has happened. It is difficult for us to make sense of this.”

Other residents have been closely following events from the seafront. “Our summer has had a dark turn. We’ve been counting the ambulances come and watching the fire brigade moving about the port.”

The Bayesian is a luxury yacht built by Italian shipbuilders Perini Navi in 2008, designed with luxury interiors and six bedroom suites on board.

It measures 56m (184ft) long and sports a 72m (236ft) aluminium mast.

The superyacht can accommodate up to 12 guests in the six suites, and is listed for rent for up to 195,000 euros (£166,000) a week.

The yacht's name is understood to derive from the Bayesian theory, which Mike Lynch's PhD thesis and the software that made his fortune was based on.

The Bayesian completed a number of sailings in recent days, calling at various ports in Sicily, according to ship-tracking website VesselFinder.

Image source, Perini Navi Press Office

All three men missing from the Bayesian shipwreck have been found, according to the AFP news agency.

A coastguard official told AFP that authorities are now only searching for one woman, which Reuters news agency have said is Mike Lynch's 18-year-old daughter Hannah.

You can see a list of all six victims, including the three men, here.

As we've been reporting, multiple reports suggest the body of British tech entrepreneur Mike Lynch has been recovered from the sunken yacht.

We know that so far five bodies have been recovered, and one person is still missing - with Reuters reporting that the missing person is Lynch's 18-year-old daughter Hannah.

Here are the names of the six people who were confirmed missing after the luxury yacht sank on Monday:

• UK businessman Mike Lynch, who helped establish Cambridge Neurodynamics and co-founded the firm Autonomy
• His daughter Hannah Lynch, an 18-year-old student
• Jonathan Bloomer, the chairman of Morgan Stanley Bank International
• His wife Judy Bloomer, a trustee of The Eve Appeal - a British charity that funds research into gynaecological cancers
• Chris Morvillo, a partner at the law firm Clifford Chance
• His wife Neda Morvillo, a jewellery designer

Fifteen others who were on board the luxury yacht were rescued, including a one-year-old baby.

Bethany Bell
Reporting from Sicily

Body bags were brought to shore - four yesterday and one today - as five of the six missing people were found in the wreck. They were put into waiting ambulances and taken to mortuaries where the formal process of identifications and post-mortems continue.

Under Italian law, the families have to be told first so there has been no formal identification so far. I haven't had a formal statement from the investigation but I do know that they have questioned the captain of the ship for two hours.

There are a lot of questions swirling around. How was it that this superyacht went down when others around it did not? Could something have been done to mitigate the extreme weather conditions?

The investigation is something that we understand will take weeks, if not months.

There were lots of locals coming to the edge of the port as the body bags were being brought out, there was a real sense of sombreness and sadness, and also a lot of shock.

The investigation is now in the hands of the Italian authorities, but there is of course support for those involved in the tragedy. This is an extremely anxious and awful time for those connected to the tragedy.

Our colleagues on the BBC News channel have been speaking to former Royal Navy Commander Tom Sharpe, who was captain of the HMS Endurance when it flooded in the South Atlantic in 2008.

He said investigators will want to explore the safety culture around the ship, but most importantly its stability - the ship should have been able to survive extreme weather.

An important question, he says, is whether the keel - a blade sticking down into the water from underneath the sailboat - was up. If it was, "You're taking away a huge element of that boat's stability".

"At that point, you can expect different measures to be in place in anticipation of bad weather, as you've completely changed the stability of that boat."

Asked how to respond to a situation like this, he says: "When it goes wrong at sea, it goes wrong very quickly."

"In this case, in the middle of the night, a boat going on its side and going down in a couple minutes - at that point I'm afraid its probably too late," he adds.

British tech entrepreneur Mike Lynch's body has been recovered from the Bayesian yacht, according to multiple reports.

A source tells Reuters that Lynch's body was recovered, but that his 18-year-old daughter, Hannah, is still missing.

The coastguard tells the PA News agency that the one body yet to be recovered is a woman.

There were 22 people on the yacht when it sank in bad weather on Monday morning.

One body was recovered from the sea soon afterwards. Fifteen survived, and six were missing, with five bodies recovered from the yacht so far.

The BBC is in contact with the Italian authorities but has not yet independently confirmed the identities of those recovered.

Medics were originally told there were only three survivors from the shipwreck, according to a doctor who attended the scene in the aftermath.

Dr Fabio Genco, Director of the Palermo Emergency Medical Services, has told the BBC his team received a call just after 05:00 (04:00 BST) from the coastguard alerting them to "three shipwreck survivors - two parents and a child".

Just a few minutes later the situation changed when Genco and his team were notified that there were "at least 10 to 20 people involved in the shipwreck".

Fifteen of the 22 people who were on board were rescued from the boat.

In the aftermath of the Bayesian's sinking, Genco describes a "tragic scene" that felt "apocalyptic", though he says this isn't the first time the team has assisted shipwreck survivors.

"We are used to many cases. We also handle [the southern Italian island of] Lampedusa, a place where there are many, many shipwrecks related to immigration.

"In the face of death and in the face of life, there is no difference between rich and poor, between nobles or commoners," he adds.

Image source, EPA

While the search continues for the one person missing after the Bayesian sunk off the coast of Sicily, we've also been hearing about some of the survivors.

Charlotte Golunski held her one-year-old daughter, Sofia, above the waves to stop her from drowning.

Dr Domenico Cipolla, of Di Cristina Children's Hospital in Palermo where the mother and child were taken, has described how Golunski and her husband were shaken by what happened.

"She told me that two minutes after falling asleep with her baby they were in the water, she did not understand how this happened, it went dark," Cipolla tells PA News agency.

She added that Golunski's partner had been in another room.

Cipolla continued: "She held the child high in her arms above the waves, for a few seconds the baby was in the water but she saved her."

The last known movements of Bayesian yachtpublished at 08:25 British Summer Time 22 August

08:25 BST 22 August

By Kumar Malhotra

BBC Verify has been looking at ship tracking data of the last movements of the Bayesian before it was hit by freak weather in the early hours of Monday and it shows just how quickly events unfolded.

The superyacht was less than one kilometre from the entrance to the harbour at Porticello on the northern coast of Sicily, according to the Marinetraffic.com website.

Just before 04:00 local time (02:00 BST) the Bayesian and a nearby yacht (Sir Robert Baden-Powell) start to move, quickly picking up speed further out to sea and away from Porticello harbour.

Less than 15 minutes later, the tracking data for the Bayesian shows that it has suddenly stopped, and the nearby yacht also stops shortly afterwards - just 200m (656ft) away.

The Sir Robert Baden-Powell is then seen moving slowly around in this area, presumably looking to rescue any survivors. The Bayesian is no longer moving, and this is its last recorded position, according to the tracking data.

A fifth body has now been recovered from the Bayesian wreck off the coast of Sicily.

One person remains missing after the luxury yacht sank on Monday.