Open Returns are designed for optimum flexibility on your part, as you don’t need to specify the time and date you’d like to make your return journey.
All you need to do is make your return journey by the date specified, which is typically a month after the outward journey.
There are three kinds of Open Return ticket available, each with varying flexibility and price. They are:
Anytime – no restriction on return travel
Off-Peak – return travel permitted on Off-Peak trains only
Super Off-Peak – return travel restricted to some Off-Peak trains.