When can you use an Off-Peak Day ticket or an Off-Peak Travelcard?

Outward and Return journeys must be made on the date shown on your ticket. Break of journey is allowed. 

Trains travelling north
On any train from London King's Cross departing 09.53 or later, except between 15.40 and 19.01 (Monday to Thursday).

Trains travelling south
On any train to London King's Cross arriving into London at 11.00 or later (Monday to Thursday). 

Please note, an exception applies to Off-Peak Day tickets between Stevenage and London King's Cross as these tickets are not valid for trains departing after 04.29 and before 09.30 (Monday to Friday). There are no restrictions for your return journey of the ticket.