The note “ SAVER TICKETS CAN BE USED ON THE 10.15 TRAIN AND ANY TRAIN AFTER THAT !” means:
1.‘Saver’ tickets cost extra if you travel after 10.15.
2.The 10.15 is the only train you can travel on with a ‘saver’ ticket.
3.The first train you can travel on with a ‘saver’ ticket is the 10.15.
4.You can use ‘saver’ tickets only if you travel after 10.15.