Originally Posted by
ppp909
When I try the "add to calendar" button in the Android app, I get a popup saying:
"Please note, you will need to add a calendar on this device before adding your booking"
I assume by that they mean a Google calendar, several of which I use constantly each day.
Assuming this is Android ...
It actually probably means the app doesn't have permission to the calendar. Go into settings -> Apps -> British Airways -> Permissions
Then check the calendar is set.