They also had the French rights for other Gundams, e.g. Seed, but used the Nozomi masters for the UK Blu-rays.It's because they have the rights for multiple regions this time for both Build Fighters and Movie Trilogy 4K, which I suspect is their new approach going forward, much like how Crunchyroll are doing with providing French & German audio for select titles.
Talking about this has reminded of how Gundam NT is literally one of the worst they've put out (stripped extras, bad authoring, theatrical masters, what an absolute slapshow of a disc that was - not to mention the film was bad enough as it was).
On the other hand: Gundam Build Fighters is currently listed as sub-only, whilest the US disc includes an Asian-English dub
