Well, the plot thickens!
I have
finally found
exactly the flights I was looking for to enable our daughter to join us on holiday! Thought I'd better ring the booking through, as she's only 14 and I just knew it would cause complications if I tried to book online.

The flights are
extortionate, more than
double what we paid for ours through Airflights months ago. I rang On the Beach holidays and explained our predicament. He refused to take the booking, as she is only 14. I explained that both of her parents would be on the same flight, so when we get to the Onur Air desk at Manchester, we will hand over our 2 lots of booking forms, and we will all be together on the same flight! Simple? Obviously not. [xx(]
Our only way around this is to change the name on one of our original flight bookings into our daughter's name, then re-book the new flight into hubby's name! The cost?
£50 admin fee, plus the difference in current flight prices compared to when we booked ours!! There is no bloody current flight price - they are all sold out! He couldn't give me a costing, as I have to put it in writing to them, at which point they will decide how much we have to pay for the name change!!

As the flights with On the Beach are
very limited, we would have to book the extra flight immediately, at an extortionate cost, or risk losing it. Then wait to find out how much we will have to pay for the name change on the original ticket!
The annoying thing is, we never originally booked to fly out of Manchester - we live in South Wales, and had nice local flights out of Bristol. These were changed to Birmingham, then cancelled again, and we were offered these flights out of Manchester. Rather than cancel altogether, we accepted them.

Basically, we are not going to be able to book anything for our daughter without it costing us an arm and a leg! Just seems so pointless!
Anyone up for a week's babysitting?
