Ahmed Hassan, 18, allegedly told a charity worker his father was killed in Iraq and the Americans were to blame

Footage has emerged of experiments allegedly carried out by an Iraqi asylum seeker who said it 'was his duty to hate Britain' before detonating an explosive on a London Underground train.

A video released by Scotland Yard today showed alleged Parsons Green bomber Ahmed Hassan carrying out experiments to destroy a mobile phone.

The Old Bailey has heard that Hassan told a charity worker his father was killed in Iraq and the Americans were to blame.

The 18-year-old arrived in Britain in October 2015, two years before he allegedly left 400g of TATP on a Tube train, which partially exploded.

Barnardo's worker Youseff Habibi told jurors he caught Hassan listening to an Arabic song on YouTube along the lines of 'coming to the slaughter in your own home' when he was living in a children's home in Surrey.

Meanwhile lecturer and mentor Katie Cable got to know Hassan at Brooklands College in Weybridge, Surrey, from April 2016.

The video begins with this clip of what appear to be a series of household toiletries

Footage has emerged of experiments allegedly carried out by Ahmed Hassan on a phone

Hassan can allegedly be seen putting chemicals over the phone during the experiment

Hassan is also allegedly seen bashing the phone with a hammer after wrapping it in foil

While there, he studied media and was placed with foster parents in Sunbury, the court heard.

Ms Cable told jurors that Hassan had said his parents had been killed. She said: 'I believe Ahmed said his father was blown up and his mother had been shot.'

Ms Cable said he had talked about Tony Blair and expressed 'anger' at events in Iraq. I believe the anger was very clear. He referred to being angry several times.'

He allegedly told her 'the British' were responsible for his parents' death.

She told jurors: 'When he first arrived he was probably in the worst state I had ever seen any of our students.

'Incredibly conflicted, frightened, confused, plagued by boredom. Snapping pens, leaving the classroom.'

Hassan can allegedly be seen drilling into the phone during attempts to destroy it

The phone can also allegedly be seen being placed into the oven on a baking tray

Hassan can allegedly be seen holding the phone during the experiments that were filmed

The phone is seen in the video being dropped into the toilet having been destroyed

But he improved after he was given foster care and by 2017 was doing 'really well', she said. In August 2016, Ms Cable discussed events in Iraq with Hassan in a park.

She said she saw a message on his WhatsApp that caused her concern, stating 'IS has accepted your donation', the court heard.

On the same occasion, he allegedly told her: 'It's my duty to hate Britain.'

On September 7 2017, Ms Cable saw Hassan at a restaurant in Kingston, South West London, and he allegedly told her it was better to be in Iraq.

She told jurors she was 'becoming really concerned about his mental state'.

The day before the bombing, he came to see her bearing presents for children, which she found 'strange'.

This image of Hassan with a knife taken in his bedroom was also released by Scotland Yard

The lounge at Hassan's home address is seen in this image issued by the Metropolitan Police

A sofa the in conservatory behind which a bag containing a trace of TATP was discovered

A bag containing a trace of TATP was found in the conservatory at his home, laid out separately

The conservatory at Hassan's home is pictured in this Metropolitan Police handout image

These jugs and pots were found in Hassan's kitchen by investigators

Ms Cable told jurors he was 'very clever'. Prosecutor Alison Morgan asked: 'Did you think he was straight with you?'

She replied: 'I don't know. If you had asked me in September I would have said yes.'

Under cross-examination, Ms Cable told how she arranged a placement for Hassan on a national citizenship scheme in the summer of 2016.

She told jurors he was 'very' enthusiastic about working at a charity shop in Weybridge.

As far as Ms Cable was concerned, he was not a supporter of Isis.

Cross-examining, Tim Moloney QC said: 'Everything you saw of him during 2016 and 2017, he desperately wanted to stay in this country.' Ms Cable said: 'It seemed so.'

Being away from college in the summer holidays was a 'huge factor' in his depression, she said. She told jurors he told her of 'flashbacks', 'bad dreams' and 'sleeplessness'.

These knives were found at Hassan's home address - similar to those found in the device

A rucksack and contents in Hassan's possession upon his arrest at the Port of Dover in Kent

A bedroom wardrobe with a container with traces of hydrogen peroxide found on top (left) and the door to Hassan's bedroom (right)

Pictured are packs of partially empty drill bits which were used as shrapnel in the device

A blue vase similar to one found in the device outside by the conservatory at Hassan's home

A container found in the bedroom wardrobe with traces of hyrdrogen peroxide found on top

Bag containing trace of TATP which were found in the conservatory at his home address

Ms Cable told jurors she was so concerned about the WhatsApp message appearing to be Isis that she contacted a civilian worker at Prevent.

She said: 'It seems such a strange thing. I was worried he might be being scammed.' The witness told jurors Hassan could be 'very secretive'.

Ms Cable said: 'He would very often receive a text or phone call and then just leave without giving a reason.'

Jurors also heard how Hassan was a 'shy young man' who chatted to college friends about Godzilla, Trainspotting and his love of horror films.

If he had any close friends, they remained a mystery to college classmates and it was 'impossible to know about his life', the court heard.

Reece Allingham worked with the 18-year-old Iraqi asylum-seeker on a 'superheroes' film project which was marked with 'distinction'.

He said in a statement that Hassan was 'quite shy' but they would joke about 'silly stuff' like Godzilla, and fake blood and watched Trainspotting together.

Following the Manchester Arena bombing last year, he said Hassan told him it was 'sad people had been killed and hurt'.

The only 'odd' thing he noticed about the horror film fanatic was one occasion when he found him sitting in a dark room on his own at college.

Lecturer Sue Pattinson said in a statement that Hassan was 'traumatised, on edge and not very trusting' and spoke very little English when he first went to Brooklands College.

Moving in with foster parents Ron and Penny Jones 'invigorated' him, she said.

Ms Pattinson said he was not a chatty boy, but he would talk about his love of sport and football rather than political or religious issues.

Yayha Farroukh got to know Hassan because they were both alone in Britain and Arabic speakers.

He helped Hassan find a foster home with the Jones family, but soon discovered they had little in common, he said.

In a statement read to court, he said Hassan had told him he came to Britain from Iraq via Turkey, Italy and France.

He wanted to be 'safe' and told him he had been detained by terrorists for one and a half months.

Mr Farroukh said Mr and Mrs Jones were 'extremely kind people' who had put him up before Hassan took over his room.

A photograph of the smoke-ridden District line carriage shortly after the device exploded

He said: 'I thought it would be nice for Ahmed. When I moved out of Penny and Ron's I stayed in touch with them and have been close to them ever since.

'I have retained contact with Ahmed more out of necessity than choice as we see each other at college and when I see Penny and Ron.

'Although we initially had things in common such as language and lack of family in the UK, I would not describe him as a close friend.

'We are very different people with very different outlooks on life. Ahmed has never really spoken to me about his friends, although he is constantly on the phone to them.

'If he was away for four or five days, he would be staying with them. Ahmed has his own life.

'It was impossible for anybody to know about his life because he was so private. The only people I ever heard him speak to were his uncle and Penny.'

Mr Farroukh visited the Jones's home in Sunbury, Surrey, on September 3 last year.

He found Hassan's bedroom door was broken and had the word 'bored' scrawled over it.

Hassan allegedly packed a bucket with TATP explosives and shrapnel and left it on the train

Ahmed Hassan is pictured waiting at the Port of Dover in Kent after arriving there by train

Hassan is pictured on board a Southern train to Brighton after the incident on the Tube

Hassan explained to him he was 'tired and bored' at home, while his foster parents were on holiday in Blackpool.

The witness also saw two vases in the room which Hassan said he 'needed', but did not explain why.

He told authorities: 'I do not know what bomb-making material looks like so I would not have recognised it if I had seen it at Ahmed's house.'

Hassan has denied attempted murder and using the chemical compound TATP to cause an explosion that was likely to endanger life.

Earlier, on the defendant's dealings with Isis, Mr Habibi told jurors: 'He did say that he had been taken by force and they threatened if he did not go to the mosque his family would be killed.

'He used to spend a lot of time in the mosque studying and sometimes he trained with them to fight.'

Asked about Hassan's background, Mr Habibi said: 'His father was a taxi driver and one morning he went to work and a bomb fell on him and he died.

'And his mum died when he was much younger. He said 'I don't remember my mum'.'

Prosecutor Alison Morgan asked: 'Did Mr Hassan ever say who he blamed for that?'

Mr Habibi replied: 'America.' He said it was American soldiers and American army bombing.

The witness told jurors that Hassan said he had not been tortured by IS but he hated the group and they killed and tortured people.

Barnardo's care home worker Zoe Spencer accompanied Hassan to an immigration interview at Lunar House in Croydon in January 2016.

Miss Spencer told jurors that when Hassan arrived in Britain he could speak little English but was keen to learn.

The kitchen timer used as an initiator mechanism, in addition to a battery and a halogen bulb

Hassan allegedly took the largest Tupperware container, pictured above, from his foster parents' kitchen to store the 300g of TATP which made up the main charge for the device

The contents of the 'Mother of Satan' bomb allegedly prepared by Hassan then put on the Tube

In addition to nuts and bolts, he is accused of placing knives inside the device to be shrapnel

Hassan, who was living with foster parents at the time, is pictured using a cash machine

She said for a then 16-year-old he appeared 'very mature' for his age.

She said: 'He told me he fled the country, that his uncle paid someone to get him in a lorry and his parents were involved in a car crash.'

Miss Spencer said Hassan was 'agitated, worried and quiet' before the immigration interview.

Officials asked Hassan: 'Have you previously or are you any part of a terrorist group, for example, Isis?'

He replied: 'Yes I was recruited by Isis for three months.'

Miss Spencer told the court Hassan had never mentioned anything like that before to her.

Shrapnel would be 'ejected at high speed' to 'increase the potential for harm' the jury was told

Other items Hassan is said to have piled into the explosive included screwdrivers

The device 'has the potential to cause damage to property and or serious harm', the jury heard

The scene of devastation was left behind after the device partially detonated on the train

Asked how she felt about it, she said: 'Disheartened, sickened, as if he did not understand the question so I stopped the interview.'

During a second interview with an interpreter, Hassan added that he had been 'forced' to go with Isis.

He said: 'I was forced to train with them on how to kill and they would teach us about the religion and what Allah believes is right.'

Hassan said he was trained with about 1,000 people and spent three or four hours in the mosque daily.

He got away when Iraqi soldiers came into Isis territory and told everyone to go, and some children stayed and some went back to their families, he said.

He denied he had been sent to Europe to work for Isis.

Miss Spencer said Hassan was 'very nervous' afterwards and told her he was not okay, adding the man at the interview was 'no good'.

Hassan is said to have gone to a Sports Direct in Ashford where bought a backpack and clothes

Hassan had not dried out the bomb-making chemicals before use, an expert said

The suspected bomber is pictured in Dover in September after travelling from London by train

CCTV cameras caught the moment the Hassan was arrested at the Port of Dover in Kent

The suspected bomber was captured as he was placed in the back of a waiting police van

About a week later, Miss Spencer saw Hassan looking at a picture of people in balaclavas with guns and the black flag of Isis.

Tim Moloney QC, defending, suggested Miss Spencer might have mistaken Hassan with another resident with a phone, but she denied it.

Hassan, now 18, allegedly packed a bucket with TATP explosives and shrapnel and left it on the District Line train on September 15 last year.

It partially exploded causing a fireball to rip through a carriage during the morning rush hour, the Old Bailey has heard.

When Hassan was picked up by police at the port of Dover the next day, he admitted he had made the bomb, the jury was told.

Hassan, who was living with foster parents in Sunbury at the time, has denied attempted murder and using the chemical compound TATP to cause an explosion that was likely to endanger life. The trial continues.