train fare help please

[Tara & Liam]

my mum is coming to visit in december but i need to book her train fares from Gatwick Airport to Eastbourne, but have no idea where you find the good discounts. anyone help

thank you.

 

[tots hope]

www.thetrainline.com

Think you need to register but it tells you all the cheapest journeys. If you book far enough in advance it should be quite reasonable x x