Hello

I was trying to book a city trip for my wife and son who is aged 12 with british airways at ba.com.
The holiday (2 day) for two adults is 99 pp to Rome (excellent value btw)
The same for an adult and a 12 yo is £179 and has fewer flight options.

Can I book my son as an adult? Would they face problems on checkin for flight/hotel?

I checked and this issue was last posted 9 years ago.
Would appreciate if anyone has recent experience on BA

Regards