Yes, it is my ticket. I tend to carry several open return tickets in my wallet but am pretty sure this one has not been used previously, despite it being close to its expiry
Yes, he read me my rights and filled in a form I had to sign. He said I would receive a letter
It is probably worth mentioning that when the ticket inspector started filling in the caution form, I got nervous and said I may have used the ticket before but I am really not sure. I thought the ticket was valid.
That being said, if I have traveled with the ticket previously, I am confident it has not been through a barrier.