Budget Travel - Thomson flight question.

I hope you may be able to help and sorry its very off topic.-
My wife and I are booked to go on a TUI package to Lefkas and the children were to stay with my Mum but unfortunately she has just passed away suddenly.

I called TUI and they want GBP 1100 for the flights for the children but if I book them separately on the Thomsons web site the flights are GBP 597 but I would need to put my son down under the adult section as lead passenger although hes only 9.
We would be flying with them anyway so they would not be unaccompanied.
We have paid a massive supplement on the villa we are staying in as there are only 2 of us going and its classed as occupancy for 5.

My question is do you think they would let us fly if at the airport when it turned out he was not an adult although all other details are correct even the title of Master was prefixed?

Thanks for any help you may give.

This topic has been moved from the BAEC forum to Budget Travel where it may receive attention from a wider audience.

LTN Phobia
Moderator: BA Forum

Firstly, I'm sorry for your loss

Lefkas is a right pain to get to aside from charter flights, a good 6 hour drive from Athens (although my parent's claim it's). Preveza's the local airport but doesn't have scheduled flights, and I wouldn't

My parents are flying PVK-MAN next week one way for £40 each.

I can't really help with your question I'm afraid. You could ask Thomson if you could cancel the flight for one of your party (no refund) and then seperatly book an adult and two children? Not necessarily on Thomson either