Originally Posted by
lost_in_translation
If you have an unlimited budget, sure. In reality, this is poor advice for many travelers. If you know you will be flying on a particular day but not exactly when due to meetings etc. and there are multiple rotations, it can certainly be advantageous to book a plus fare with BA which locks in a cheaper price and allows you to switch on the day subject to availability.
Bingo! I always travel on the same day, I know that much in advance but meetings change things all the time, like today (which I knew about 2 days ago...hence waiting until midnight to change it). This is the first time I have purchased a HBO fare, which I will never do again as I have found out the hard way (by not checking that you couldn't change it FOC on the day of travel).