That's right if booked after 11 December 2019 Airport check-in fee €55/£55 per passenger per one-way flight Free for Flexi Plus passengers (and Plus passengers who booked after 11 December 2019). https://www.ryanair.com/gb/en/useful-info/help-centre/fees
ありがとう。 これからの予約なので、Plus passengerは、Freeチャージなんですね。