Reply To: 2 bookings on same day (different flights) will BA care?

[yonasl]

You cannot book yourself multiple times on the same flight (well, you can try but they may find out and cancel you). But nobody cares if you have multiple bookings on the same day.

The issue mentioned by @ClubSmed is different. If you miss your outward journey you cannot take the return one as you waived your whole itinerary.