That doesn't match what you said earlier though... Something doesn't seem right here..
--- old post above --- --- new post below ---
Getting off the train and then back on straight away as DaveNewcastle says would be enough to demonstrate intent.
Let me clarify:
1) I can't remember whether he was in uniform, but he does not have a green badge (which FGW conductors have with their names on) on his chest;
2) He had a ticket machine with him on that day and others purchased tickets from him, including the lady standing beside me who was purchasing her ticket while I asked for a ticket from oldfield park to Keynsham from him;
3) He looked at my ticket from bath spa to oldfield park, instead of issuing me a ticket as I asked, he asked why I only got a ticket for that part of my journey but decided to travel on, I explained that because when I purchased the ticket I was only intended to travel to oldfield park but now I had to travel to Keynsham
4) He asked for whether I have any ID with me, I then presented him with my driving licence. He asked me to write down my name, address and contact number on a notebook he took out from his pocket
5) He informed me that I was travelling with out a ticket, I said but I wanted to buy one, he said not until I asked, I said no I asked before you asked me, he said it is called over travelling (or something similar I can't remember the exact words, some term meaning I got a ticket for only part of my journey I believe)
6) I continued to explain, he interrupted me a couple of times, and then he told me he was actually a police officer, showed me the badge
7) I was shocked as never been talked to by a police officer before so went blank for a while, when I tried to explain again he said he would get off with me at Keynsham and to explain this
8) because the train was about to arrive in Keynsham, I did not say anything more because I thought he would get off the train at keynsham with me to listen to my explanation;
9) he got off the train with me, gave me a caution (he spoke very quickly when giving the caution)
10) he jumped on the train again and left
I'm positive that he said he was a police officer. I was then convinced that he was when he gave me a caution. I thought only police officers have the right to give caution? I might be wrong here but he did say he was a police officer and showed me a badge which is very different from just a name badge.
11) he called me about three weeks later on my mobile, accusing me of giving wrong information, asked me to confirm my name and address
12) about a week after the conversation I received the letter.