No you don't just went on line put on my season card number and booked 2 returns to Edinburgh with 20% discount. Also being the cynical twat that i am i looked at the prices without clicking on the supporters link first and it was dearer.You have to buy a discount card. The Virgin Trains 20% discount is free to all season card holder's
Whethere you choose to use it or not is entirely up to the season card holder