This all shows that TOCs should be stripped of the power to prosecute. Northern are clearly trying to intimidate the OP into providing evidence. I used to do prosecutions for a local authority, and we were left in no doubt that we had to investigate fairly and reach a conclusion as to whether an offence had been committed, and could be proved beyond reasonable doubt to have been committed. The same as Crown Prosecution Service standards. A Solicitor is an officer of the court, with professional standards. TOC staff are not.