McKenzie Morgan, 18, who has been jailed for 14 months at the Old Bailey, told friends of plans to target an Oasis concert in Cardiff on July 4, and had a note targeting the dance club near his home.Axel Rudakubana, 18, was jailed for minimum of 52 years last January for murdering three girls at a Taylor Swift-themed dance class in the Merseyside town in July 2024, when he was aged 17.Morgan, who was also aged 17 at the time of the offences, had pleaded guilty to possessing a document useful for terrorism.