Originally Posted by
shihyin
To add your Business extra number to a British Airways reservation you will want to do the following.
1) Go to
www.britishairways.com
2) Select 'Manage My Booking' tab
3) Follow the instructions to pull up your reservation
4) Select the link towards bottom listed under 'Quick Links' 'Add On Business or Business Extra number'
5) Add your Business Extra number and check the box to give your consent.
It's under the very busy "Quick Links" at the bottom so very easy to miss! Good luck!
I added this to the Wiki
^^^
Pleasantly surprised to get the perfect answer here! I just assumed BA made it incredibly difficult to do. Got it added thanks to these instructions. Thanks!