Hi, I'm new to this forum and I have a question about something that I saw earlier today. If someone did not have a valid ticket/oyster for a journey on, for example, the London Underground then if they are stopped by an inspector inside the gates at a station then of course that person can be referred for prosecution. However, when I was walking out of Plaistow station today, I saw a few inspectors that were outside of the gates, inspecting peoples tickets as they went by. My question is, does a TOC have any legal ground to prosecute somebody who is 'caught' outside the gates at a train station? Surely, if someone was stopped, what obligation do I have to produce my ticket when surely I have the right to simply walk away?