On-Peak: 3 pm - 8 pm: Rate is typically higher than the standard rate. Off-Peak: 8 pm - 6 am: Rate is typically lower than the standard rate.
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Off-peak hours: Hours of the day that have low energy demand resulting in lower prices. In general, off-peak hours are all hours outside of 4 p.m. to 9 p.m. Various energy pricing plans can have “super off-peak” time periods that offer even lower prices.
In general, Off-Peak hours begin at 09:30 from Monday to Friday in cities and large towns, and at 09:00 everywhere else. If your train is scheduled to depart after this time, you can travel with an Off-Peak ticket.
Not to be confused with Off-Peak Day Returns, the Off-Peak Return ticket requires you to make the outward part of your journey on the date shown on the ticket. The return part of your journey, however, can be completed on any day on an Off-Peak train within one calendar month of the ticket's issue date.
Off-Peak tickets give you some flexibility - if you can still use an Off-Peak ticket on the train you now want to travel on, you can just catch that one instead! If you want to travel during peak time, you'll just need to pay the difference between the Off-Peak fare and the Anytime fare.
Off-Peak Day Travelcards are valid for unlimited travel from 09:30 Mondays to Fridays, (00:01 Saturdays, Sundays and public holidays) on the day for which the ticket is dated and until 04:29 on the following day.