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Meghan Trainor abruptly cancelled her nationwide Get In Girl Tour which was set to kick off in two months.
The Married... With Children actress announced her diagnosis with the chronic autoimmune disease in 2021.
Authorities accessed a closed chat between colleagues, downloaded evidence and then lured the man to a meeting and arrested him.
It comes after it emerged the peer failed security vetting but the Foreign Office still allowed him to take up the post.