英国火车票票种

请大家帮忙看看这个火车票是固定时间，还是回程可以在当天随便坐哪躺车都可以？是不能选座位的吗？谢谢啦！Journey 1: LONDON KINGS CROSS to CAMBRIDGE STATIONDepartsArrivesByReservations08:44 - London Kings Cross09:30 - Cambridge StationTrain (GREAT NORTHERN) Reservation not possible. 15:47 - Cambridge Station16:34 - London Kings CrossTrain (GREAT NORTHERN) Reservation not possible. Ticket details Passengers: 1 Adult(s) , 1 Child(ren) Ticket Type: SUPER OFF-PEAK DAY RETURNRoute: Travel is allowed via any permitted route.

QuantityTypeAmount1FAMILY AND FRIENDS RAILCARD adult @ £10.95£10.951FAMILY AND FRIENDS RAILCARD child @ £3.15£3.15