In case you enter a discount code during checkout that doesn't exist or isn't currently active, then you can see the message: “Unable to find a valid discount matching the code entered”.

Usually, Coupon Stacking is not allowed at Trainline. However, the store will surely give out notice if available.

Yes. Coupons for each Discount Event of Trainline will be collected here while being updated day by day. Sometimes, there will be deals not updated promptly but it's rare, we expect sympathy from you. 

Yes. Like all other stores, Trainline offers a number of Cyber Monday Coupons. Don't forget to check the expiry date before making your purchase.