I had booked Belfast - London flights for myself and my son. A few weeks later my 14 year old daughter decided to come, so I set about booking her a ticket online. However it is not possible to book a teen by themselves, so the website advises to book them as an adult, then contact Customer Services and link her to our booking.
Today I tried to do this, but the very (very) rude person on the phone told me it would cost me £30 to change her from an adult ticket to a teen ticket (even though there is no price difference in the fares).
I'm wondering could we just wing it, say nothing and hope they don't notice she is traveling with on an adult ticket instead of a teen ticket? Any advice would be greatly appreciated.