Just minutes before he was seized, Chail allegedly sent a bizarre and chilling video to friends. It featured a hooded figure wearing a mask and carrying a crossbow. During the footage, the mystery man threatened to assassinate the Queen in revenge for the Amritsar Massacre in India in 1919.

       The teenager lives with his parents and sister on a private estate in North Baddesley, Southampton. Friends said he attended a "posh" primary school before going to Toynbee School in Chandler's Ford, about four miles from home.

       One former friend described Chail as an "odd" boy who tried to make others laugh. The friend said: "He was always a bit odd and quiet most of the time." Another commented: "He was nerdy, but not in a way like, 'I'm so clever.' He was pretty normal."

       Just minutes before he was seized, Chail allegedly sent a bizarre and chilling video to friends. It featured a hooded figure wearing a mask and carrying a crossbow. During the footage, the mystery man threatened to assassinate the Queen in revenge for the Amritsar Massacre in India in 1919.

       The teenager lives with his parents and sister on a private estate in North Baddesley, Southampton. Friends said he attended a "posh" primary school before going to Toynbee School in Chandler's Ford, about four miles from home.

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       One former friend described Chail as an "odd" boy who tried to make others laugh. The friend said: "He was always a bit odd and quiet most of the time." Another commented: "He was nerdy, but not in a way like, 'I'm so clever.' He was pretty normal."

       Chail's family are struggling to come to terms with his arrest. His father Jasbir Singh Chail, 57, had allegedly told neighbours at the height of the lockdown that he was concerned about the impact it was having on his son, claiming it had left him "isolated and demotivated".

       In the video allegedly sent to Chail's friends, the masked figure said he was also acting in revenge for those who had suffered discrimination due to their race. A former friend said: "I was in his religious studies class and he never had many views on anything to do with racism."

       Yesterday, neighbours of the family suggested the pressures of lockdown may have affected the youngster. One said Chail's father "mentioned a few times how difficult it was getting his son involved in anything positive or trying to motivate him and was blaming the lockdown".

       The neighbour added: "The dad told me that his son was spending more time alone in his room on social media and the lockdown had made this worse."