A man in his 40s or 50s "smiled at me and I quickly turned back and tried to step forward to create more distance between us. A seat then became available behind me, which I didn’t want to sit in because I knew the man would then be standing over me. He touched the side of my bum/hip area and said, 'Are you sure you don’t want to sit down?' I said 'No thank you' and stood there, he then sat down and sat so forward that his knee touched my leg. I inched forward to create a gap between us and he inched forward and we touched again." She added: "I felt really distressed at this point because he was being sly and calculated. I got off at the next station and changed carriages."