From Staines station an off peak day return ticket to Brighton costs £24.20, a month off peak return ticket costs £30.30. There is no cheaper advance tickets available whereas from some further stations, for example Bath Spa to Brighton each journey could be as £13 or £15. Why? By the way, why are day return tickets often only 10p more expensive than their counterpart single tickets? Is it to encourage passengers to return the same day?