I was travelling on an East Midlands train from Nottingham to Norwich. This train stops at Grantham. The previous train to Grantham was cancelled, so the train was very crowded.
I had a seat reservation. Despite this, a woman was sitting in my seat, and refused to move. She claimed that because the previous train to Grantham was cancelled, she is entitled to keep her seat reservation on this train, and I can claim my money back because my seat was unavailable. I was not going to argue with her, so allowed her to stay there.
Who was right?