For anyone planning a longer journey by train, I recently came across several recommendations on mumsnet about using Seatfrog to secure train upgrades (to first class) for a much cheaper price than it would cost on the train.
i didn’t even know this was available, but also didn’t know at the time that you can use a referral code to save money when you use the app. Anyway, just wanted to share this as an extra discount. I’ve posted my own referral in the right place (last page of the bargains / referral codes board) but if you don’t want to use mine you can probably just google referral code for Seatfrog and you’ll find one. (Wish I had done that 😬).
https://www.mumsnet.com/talk/christmas/5212180-bargain-referrals-thread-7