Plymouth bomb: How will disposal of WWII explosive work – and is there a risk it could explode?
More than 3,000 people have left their homes after an unexploded Second World War bomb was found in the back garden of a home in Plymouth.
Devon and Cornwall Police declared a major incident on Tuesday and evacuated properties within 200 metres of the bomb, extending it to 309 metres on Thursday.
Plymouth Council has confirmed bomb disposal experts from the army and navy plan to dispose of the bomb today – but how will they do it?
Here’s everything we know about the bomb and what’s being done to remove it – plus expertise from a bomb disposal expert.
What do we know about the bomb?
The bomb, which can also be referred to as an unexploded ordnance (UO), is a 500kg (1,102lb) German bomb from the Second World War, a Ministry of Defence (MoD) spokesperson has said.
The MoD identified it as a SC500 transverse fuzed airdrop weapon which, according to the Luftwaffe Resource Centre’s website, was a “general demolition bomb”.
Pic: FPS Images
It’s the same type of bomb that was found off the north coast of Guernsey in July 2023 by a local diver. The Royal Navy carried out a controlled explosion on the Guernsey bomb within an hour of specialist divers going to see it for the first time.
Andy Abbott, who spent 25 years in the Army Reserve’s bomb unit, told Sky News it was one of the biggest types of bombs the Germans dropped during the war that still get found today.
Where is the bomb and how was it found?
Officers were first called to a property on St Michael Avenue in Keyham on Tuesday, after a man reported finding the device while digging out the foundations for an extension in the garden.
Speaking to Plymouth Live, the man who called police said he actually found it “about a week ago”.
Map shows the area where a cordon is in place
He said he “hit something with a spade, but we weren’t sure what it was at first”.
He said rain over the next few days made the object increasingly visible.
The man called the police on Tuesday and sent them photos.
“Five minutes later there’s a knock on the door and police officers asking to have a look,” he said. “The next minute they’re suggesting a cordon.”
Mr Abbott said bombs such as this one are usually found in big fields or in docks rather than more confined places such as the Keyham garden.
Who is dealing with it? And could it explode?
It was Devon and Cornwall Police who first came to the scene, but since then there has been the Royal Navy’s bomb disposal unit, military personnel and service members of various search and rescue teams, including from the local fire brigade.
Plymouth Council said the bomb would be removed and transported by military convoy through the city for disposal at sea.
In a statement, the council said the bomb disposal experts considered a controlled detonation on site, but ultimately decided “the safest and least impactful option is to remove the device from St Michael Avenue and travel to the Torpoint Ferry slipway – for the bomb to be disposed of at sea (beyond the Breakwater)”.
“Highly trained bomb disposal experts will carefully remove the device from the property and it will be transported by road in a military convoy, west along Parkside and Royal Navy Avenue, joining at the junction on Saltash Road to continue south joining Albert Road, turning right along Park Avenue and heading down Ferry Road to the Torpoint Ferry terminal,” the statement said.
Mr Abbott says “the best option is to always blow it up in situ”, but added the squad would have weighed up the damage that could be done to nearby houses and infrastructure.
When it comes to moving it “there is a risk, but it’s a minimal risk,” he added. “They wouldn’t be going with this process if they hadn’t weighed up the odds and found that it was pretty safe. But it is a big one, and there’s obviously always a slight risk.”
Explaining the process, he said: “They’ll probably lift the bomb onto the back of a truck, most likely with a crane.
“You protect it as much as you can on the back of the truck, probably by burying it in loads of sandbags, then they’ll gradually move it with a police cordon in place down to the sea.”
Images on Thursday showed tonnes of sand being delivered to the area, which a police source told Plymouth Live would be used to build a sand wall around the unexploded bomb.
Mr Abbott said sand and water bags are often used to mitigate for the bomb going off and that the bomb squad would have weighed up detonating the bomb on site, using them to contain the explosion.
“But you’re probably going to be blowing up four or five houses at least,” he said. “Even if you try and mitigate the explosion, the damage to those properties… they would be knocked down.”
Royal Naval Bomb Disposal experts dug around the explosive and used a special device to assess it.
A team of 200 volunteers from some of the organisations mentioned above have been visiting houses in the Keyham area, checking that the necessary homes have been evacuated and offering information to local residents.
Why not just diffuse it?
Mr Abbott says that while a fuse as old as the ones in a WW2 bomb are unlikely to be dangerous, there is a type of explosive acid often built into them which may cause problems while trying to diffuse it.
“Obviously the device is very old now. The fusion system they used on these were two fuses that transverse in the bomb itself,” he explained.
“So you’d have to mitigate the fusing. And by now, after this time, the fuses would be quite safe. The only issue you might have is sometimes these things were filled with picric acid, so you’d have picric crystals that can form after leaking and that is dangerous.
“So if you try and remove the fuse or take the fuse out that way, that could have the same effect as the fuse actually working. So you need to mitigate the risk of that too.”
How many people have been evacuated and when can they go back?
The cordon has meant 1,219 properties have been affected and an estimated 3,250 people have had to leave the area this week, with residents encouraged to stay with friends and family.
Those who have been evacuated have only been allowed to return to their homes to collect “urgent, essential items only” including medication or a pet, the council added.
But now residents of the Devon city living within 300 metres of the convoy route will need to completely evacuate their home between the hours of 2pm and 5pm this afternoon.
The council said it would “aim to keep residents informed throughout the operation” and that it would announce when roads are being reopened on its website and on social media.
Plymouth’s Life Centre has been set up as an emergency rest centre with tea and coffee, blankets, towels and toothbrushes, a creche and faith room available.
A similar incident to this one occurred in Plymouth in 2011, when an explosive device was unearthed by a workman at a building in Notte Street, near the city’s Hoe.
The device was made safe before it was moved to the seabed off Plymouth Sound, with an exclusion zone around it.
Plymouth saw more than 50 bombing attacks during the Second World War.
UK
More than 500 people arrested after Palestine Action protest – with almost half aged 60 and above
The number of people arrested after a protest in London on Saturday supporting banned group Palestine Action has risen to 532, police have said.
Around half of them (259) were aged 60 and above – including almost 100 people who were in their 70s.
Some 522 arrests were for displaying a placard in support of a proscribed organisation contrary to Section 13 of the Terrorism Act 2000, according to the Metropolitan Police.
As of 9pm on Saturday, the number was put at 466.
Membership of, or support for, Palestine Action is a criminal offence punishable by up to 14 years in prison under the Terrorism Act.
A rally supporting Palestine Action in Parliament Square. Pic: Reuters
One of the arrests took place as the Palestine Coalition march formed in Russell Square, while 521 were at the protest in Parliament Square.
Of those arrested, the biggest number (147) was in the 60-69 age group, while 97 people were aged between 70 and 79, and 15 others were between 80-89.
Six were aged 17-19, sixty-five were in the 20-29 age group, 55 were aged 30-39, 45 were aged 40-49 and 89 were in the 50-59 age group.
The average age of those arrested was 54, while some 263 of those arrested were male, 261 were female and eight either defined themselves as non-binary or did not disclose their gender.
Among the arrests, six were for assaults on officers (none were seriously injured), one was for “obstructing a constable in the execution of his/her duty”, two were for breaching Section 14 Public Order Act conditions, and one was for a racially aggravated public order offence.
People attend the protest in central London. Pic: PA
Hundreds of people attended Saturday’s demonstration in Parliament Square, organised by Defend Our Juries, with the Metropolitan Police warning it would arrest anyone expressing support for Palestine Action.
Anyone who was arrested as part of the operation was taken to one of two prisoner processing points in the Westminster area.
Those whose details could be confirmed were released on bail to appear at a police station at a future date. They were given conditions not to attend future demonstrations related to Palestine Action.
Those who refused to provide their details at the prisoner processing points and those who were found to have been arrested while already on bail, were taken to one of a number of Met Police custody suites.
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Charity Amnesty International described the mass arrests under UK terrorism law as “deeply concerning”.
The crowd, sat on the grass inside Parliament Square, could be seen writing “I oppose genocide, I support Palestine Action” on white placards at 1pm, with the vast majority remaining silent.
Meanwhile on Sunday, hundreds of people joined a march on Downing Street to urge the release of those being held in Gaza by Palestinian militant group Hamas.
A scuffle broke out after at least two men shouted “Free Palestine” in front of the march.
One man was seen being bundled to the ground close to Trafalgar Square after being surrounded by around a dozen people.
Another man was seen being moved away by police officers after he began shouting.
Amnesty International says it is “deeply concerning” that police made 474 arrests during a Palestine Action demonstration in London.
Metropolitan Police said 466 were detained under the Terrorism Act for showing support for a banned group.
Eight more people were arrested for other offences, including five for assaulting officers.
The Met said it was the most arrests it’s made related to a single operation in at least the past decade.
Pic: PA
Organiser of the event, Defend Our Juries, earlier said up to 700 people were at the event in Parliament Square and claimed police were preparing for the “largest mass arrest in their history”.
The group said those arrested included former Guantanamo Bay detainee Moazzam Begg, NHS workers, quakers and a blind wheelchair user.
Amnesty International UK’s chief executive Sacha Deshmukh said in a statement: “The protesters in Parliament Square were not inciting violence and it is entirely disproportionate to the point of absurdity to be treating them as terrorists.
“Instead of criminalising peaceful demonstrators, the government should be focusing on taking immediate and unequivocal action to put a stop to Israel’s genocide and ending any risk of UK complicity in it.”
The Met said a “significant number of people” at the event were seen “displaying placards expressing support for Palestine Action”.
Home Secretary Yvette Cooper said: “The right to protest is one we protect fiercely but this is very different from displaying support for this one specific and narrow, proscribed organisation.
“Palestine Action was proscribed based on strong security advice following serious attacks the group has committed, involving violence, significant injuries and extensive criminal damage.”
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Palestine Action supporters arrested at protest
Police said those arrested had been taken to processing points in Westminster and any whose details could be confirmed were bailed on condition they didn’t attend further Palestine Action support events.
Others whose details could not be verified, possibly because they refused to give them, were taken to custody suites across London.
Pic: PA
The protests have put a strain on authorities’ capacity to cope.
Sky News understands senior leaders in the prison service, known as “Capacity Gold”, met today to discuss how to deal with the large number of arrests as the male prison estate is close to full.
It’s understood 800 inmates were moved out of the busiest jails in and around London beforehand.
In a statement, the Metropolitan Police Federation said: “Thinking of our colleagues and wishing all assaulted officers well. Remember there are no ‘extra’ police officers – just the same ones having their days off cancelled, having to work longer shifts and being moved from other areas. Officers are emotionally and physically exhausted.”
Read more: What does proscribing a group mean?
Legislation to ban Palestine Action came into force on 5 July, making it a criminal offence to show support for the organisation, carrying a prison sentence of up to 14 years.
Defend Our Juries said earlier this week the protest would still go ahead, following several similar demonstrations since it was outlawed last month.
On Saturday, a spokesperson said: “Palestine Action and people holding cardboard signs present no danger to the public at large.”
Pic: PA
Human rights advocates Amnesty International described the arrests of so many people under UK terrorism law as “deeply concerning”.
Another march organised by the Palestine Coalition, which is a separate group, set off from Russell Square and assembled on Whitehall.
The Met Police said one person had been arrested there for showing a placard in support of Palestine Action.
Pic: Reuters
Earlier this week, three people charged as a result of illegal Palestine Action activity were named.
Jeremy Shippam, 71, of West Sussex, Judit Murray, also 71, of Surrey, and Fiona Maclean, 53, of Hackney in east London, will appear at Westminster Magistrates’ Court on 16 September.
The ban on Palestine Action faces a legal challenge in November after the High Court granted a full judicial review to Palestine Action co-founder Huda Ammori.
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