Group Save is available on ATOS WebTIS (Mixing Deck) websites. It's offered as a default fare option if the right number of people are selected and Group Save is available on the journey being made. A 'G' in the fare box denotes the Group Save fare. You don't have to select it as a 'Railcard' option as is the case with thetrainline powered websites. Much better being offered as a default than having to select the option yourself.