Okay, cheers - I was a bit confused by the previous post!
As was said the coaches were owned by Cargo-D, who went into administration. This is current status of each coach that was used by Hull Trains,
12043 - operated by Chiltern Railways, in their slam-door Blue & Grey set
12014 - operated by Chiltern Railways, converted with sliding plug doors and now numbered 12609
12038 - operated by Chiltern Railways, converted with sliding plug doors and now numbered 12607
10202 - stored at Long Marston, owned by Arriva, in Blue & Grey livery
11031 - operated by Chiltern Railways, in their slam-door Blue & Grey set
DVT 82115 - stored at Wolverton Works, owned by Network Rail, in BR Blue livery.
And the loco, 86101, remains in AC Loco Group ownership (and retains the same livery and name). It makes the occasional mainline appearance, and is due to move up to Mossend (Scotland) today for winter 'ice breaker' duties.