Half price Advance tickets can be purchased until Sunday 23 February inclusive. For travel on Sundays throughout February. To get the extra 50% saving to Advance fares through the Northern app and Northern website, the code SUNDAYS50 should be added into the promotional code field. Advance and Save on the Day tickets are sold in limited numbers and are only available on specific routes, subject to availability. Normal Advance Purchase or Save on the Day conditions apply and Railcard discounts apply.