I he fares highlighted in yellow show the cheapest options for the journey and times chosen. You also have the option to click on earlier or later trains as per below.
Figure 1.54 Tran Options / Available Fares
Follow the below three steps:
Select "outbound" train times
Select return times
Verify the train ticket types and costings
Once you have selected the required times, the available fares will be shown on the right hand side of the screen. See Figure 1.54