An Uber driver cleared of launching a Samurai sword attack on police outside Buckingham Palace went on to plan another attack on tourists in London, a court heard today.
Mohiussunnath Chowdhury, of Luton, Bedfordshire, allegedly boasted to undercover police how he had deceived a jury into finding him not guilty of the attack.
The 28-year-old was 'motivated by dreams of martyrdom for the cause of Islam, and inspired by preachers of hate', a jury at Woolwich Crown Court was told.
Duncan Atkinson QC, prosecuting, said Chowdbury was 'keen to take part in an attack on a high profile and very public target in the UK.'
Mohiussunnath Chowdhury (left, in a court sketch) is accused of accused of preparing acts of terrorism and his sister Sneha Chowdhury (right, outside Woolwich Crown Court on Monday) is accused of failing to disclose information
Chowdhury had also allegedly sketched a picture of a man shooting at 10 Downing Street
The targets mentioned included Madame Tussauds in London, the Gay Pride parade, and an attack on tourists on a London open-top tour bus, the jury was told.
'The object was to unleash death and suffering on non-Muslim members of the public who happened to be present, using a firearm, sword and even a van as part of an attack,' the prosecutor said.
Chowdhury told undercover officers that he had indeed been trying to carry out a terrorist attack in 2017 and that he had 'deceived' the earlier jury that acquitted him of it, the court was told.
Chowdhury is accused of accused of preparing acts of terrorism and his sister Sneha Chowdhury, 25, is accused of failing to disclose information.
A police image of the sword used during the incident outside Buckingham Palace in London
Another photograph of the sword allegedly used in the incident at Buckingham Palace
His sister had 'better reason than anyone to understand what her brother was thinking, and wanting to achieve,' Mr Atkinson said.
Mohiussunnath Chowdhury had a big beard and looked unkempt at the time of his first trial, the court heard today.
He allegedly told undercover officers that a fellow inmate gave him the advice to 'play the game' and shave his beard off.
On the day of his planned 'suicide' in August 2017, Chowdhury changed his WhatsApp profile picture to a green bird, said to be a reference to martyrdom.
He also wrote his sister a note which read: 'The Queen and her soldiers will all be in the hellfire they go to war with Muslims around the world and kill them without any mercy.'
After his acquittal, Chowdhury told undercover officers that he had initially gone to Windsor Castle, because his intention was to kill a soldier but when he got there, he could not see any soldiers so he drove to Buckingham Palace.
He said that on the way to commit the attack he had listened to and found inspiration from the lectures of the al-Qaeda preacher, Anwar Al Awlaki.
During the conversation in March last year, he told the officers, that when he got to the Palace, the only soldiers he could see were too far away behind a gate to reach, so he began to manoeuvre his vehicle to attract the attention of police in a nearby van.
Woolwich Crown Court was told that an officer managed to get the passenger door open and stop him from swinging or stabbing with the weapon, but there was then a short struggle with the officers trying to get the sword from Chowdhury while he was punching them and they were punching him, as he shouted: 'Allahu Akbar' [god is great] over and over again.
Chowdhury was put on trial twice for the attack, after the first jury was unable to reach a verdict.
Before the second trial, on September 27 2018, drawings were found in Chowdhury's cell at Belmarsh jail, which make reference to 'paradise' and showed a terrorist shouting 'Allahu Akbar' and firing at a police officer outside 10 Downing Street.
At the time of his first trial Chowdhury had a big beard and looked unkempt.
But he used the word 'deceive' when he was referring to his appearance and appeared 'very proud' when he was speaking about how he had fooled the jury, the court was told.
'Despite his acquittal on December 20 2018, once he was released from custody he immediately showed that his mindset had not changed one jot,' Mr Atkinson said.
The mindset has been 'entrenched since at least 2017,' Mr Atkinson added. 'It was a mindset that led him to attempt to carry out a terrorist attack, putting into practice his view that the UK government, army and police were enemies of Allah and that he would be rewarded in paradise if he became a martyr for Islam through an act of violence against those enemies.'
'Whilst she may have hoped that it was all over when he was released from prison, and that his acquittal meant that he had not meant those things, his actions and his conversations with her once he was released in late December 2018 showed quite the opposite.'
Chowdhury purchased a replica Glock gun and told undercover officers what he was planning to do and why.
'He told them of his training regime, and sought to involve them in his firearms-related training,' Mr Atkinson said.
'He told them of what he was wanting and planning to do, and sought to involve them in the carrying out of one or more terrorist attacks.'
In the lead-up to the incident outside Buckingham Palace on August 25, 2017, Chowdhury's activities over the internet and on social media made it clear that he was a supporter of Islamic extremism, and ISIS in particular, the court heard.
Chowdhury told the jury in that case that his appearance with a sword outside Buckingham Palace had been an attempt at suicide, not an attack.
However, within days of his acquittal in December 2018, Chowdhury posted a story on Instagram extolling the virtues of martyrdom for Allah and an image of the police