The one doing it has only done it once, when she treated a gunshot wound instead of helping the wounded to the A&E. When the wound was infected, she brought him to A&E and admitted that it had been her treating him before. She's eighteen. The police know how the boy got shot and knows that he had not been involved in anything illegal, so the only trouble they have with the law is her "problem".
looked around www.lawcom.gov.uk/, googled "UK law", "medicine witohut a licence/license", "UK law medicine without a licence" and couldn't find anything I needed.