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He repeatedly pretended in texts to his victim's mother, Alison Spencer, that her daughter was "alive and well".

They pretended to be lots of different people, using lots of different credit cards, when they bought the tickets from companies such as Ticketmaster, See Tickets or AXS - which are known as primary ticketing websites.

"Girls from the class above started complaining about her speaking Ukrainian. Then they pretended to fall to the ground shouting 'Missile! Get down!' and laughing," Svitlana says.

"He pretended to be a younger male and on occasions a female to gain the trust of other younger people," she said.

That individual then took on the role of an inexperienced school bursar - an administrator - who pretended to not know what was going on.