Yes you can.

However, a minimum fare applies for all journeys made between 4.30am and 9.59am Monday to Friday, excluding Public Holidays and July and August.

At the time of publishing the minimum fare is £12.

If you travel regularly before 10am, then a weekly or monthly season ticket may be more appropriate, though you won’t be able to get a Railcard discount.

With your Railcard you can get 1/3 off Anytime Day Travelcard when bought as part of your journey to London from outside London Zones 1-9 (subject to a minimum fare which is currently £19.10).
 
With an Oyster card, you can get your Railcard discount loaded onto your Oyster card to save 1/3 on single off-peak pay as you go fares on London Underground and Docklands Light Railway services in London. You will need to have registered your Oyster in your name to do this. Simply take your Oyster card and valid Railcard to a London Underground station and ask a member of staff to set the discount for you. You can also get the discount set at Oyster Ticket Shops and Visitor Centres.

It can take up to 5 working days to process your application but once approved your digital Railcard will be available to download and use stright away.

Yes. You as the cardholder can buy tickets for your named companion and up to four children as long as they are travelling with you.

Discounted price tickets purchased by a Veterans Railcard holder should be issued for travel for the same origin and destination and should normally be of the same ticket type (example all Off-Peak Returns). 

Yes, you can buy a Veterans Railcard for a friend or family member as long as they are eligible for the Railcard. You will need to supply the evidence to prove their eligibility.

To order the Railcard log in to your account (or register one if you do not already have one) and then when you get to the question, "Is this Railcard for you or someone else?" choose the option for "someone else" and continue the process. If you select you want a physical Railcard, you will have the option of having the Railcard delivered to the UK address of your choosing. The Railcard will then be sent along with information as to how the Railcard holder can create their Railcard account if they wish.