...(in general) 16-25 railcards don't give first discount.
...try the group discount.
On the Family & Friends Railcard website : http://www.familyandfriends-railcard.co.uk/buy-family-friends-railcard/faqs/validityJust out of interest: where does it state that there are no First Class discounts at all with Family Railcards?
FAQ 3. said:3. Can I purchase First Class tickets with my Railcard?
No, First Class tickets cannot be purchased using your Railcard, except for Upgrades to First Class at weekends (subject to availability) upon payment of the appropriate supplement.
The group discount applies to a group of 3 people or more; it's as simple as that. It is applied automatically when using the East Coast booking engine.Depending on the size of the group and the number of adults and children, could you use the group discount for the adults and Child First Class Advances for the children?