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Jessica Hefferon, 31, turned up out of the blue at an after-school club when Sensei Ryan Derbyshire was giving martial arts tips to a youngster and accused him of strangling her during an argument.
Jessica Hefferon from Widnes, Cheshire, turned up unexpectedly to 'Sensei' Ryan Derbyshire's after-school karate class, falsely accusing him of strangling her in an argument