I live and work in London but am from Southampton originally so will travel between the 2 locations fairly frequently. Depending on when I will travel I will use a combination of Megatrain tickets. Southern Advanced Fares, Greyhound fares and paying the full Off Peak Return fare. Eg I will travel Waterloo-Southampton on a Friday afternoon using the outward portion of an Off Peak Return. On Sunday afternoon I will get the 4pm Greyhound departure to London. 2 weeks later I might get a megatrain from Waterloo to Southampton at 1.39pm on a Saturday and return to London later that evening using the return portion of the Off peak return. In the latter scenario, I would have no luggage as I would only have gone down to Southampton for the day. My question is would this arouse the suspicions of RPI staff why did this guy travel down on day 1 and is returning on day 14 with no luggage. Whilst I would have proof of the other journeys as they would have been booked online am I under any obligation to provide this information to the guard or RPI staff or should I not worry as I am using the return half of an unused ticket regardless of the fact that I am not carrying luggage?