So I am well aware of the fact that if I book 2 seats as outright redemptions and would want to change it to a 2-4-1 at a later date, it's not all that straightforward and requires cancelling the existing reservation (which may or may not release the seats to the redemption buckets). Now, let's assume I've had two seats booked and now want to get half of the avios back by applying a 2-4-1. I can use a GGL redemption to open availability (subject to the usual - the relevant buckets still having seats and no other GGLs having snapped my seats). Would this work?
Specifically I am looking to use two 2-4-1s but currently only have one. So ideally I would like to make a booking for 4 people using one 2-4-1 and then apply the second one. Has anyone tried that and can report success?