Joanna Mills has replaced Catriona Cuddihy on the relay team after a successful appeal....correct decision in my view but it never should have come to this. The AAI made a huge blunder by putting Catriona on the team ahead of Joanna, there was absolutely no grounds they could argue for a legitimate reason behind that decision. Mills is much younger, much faster personal best, faster season's best, proven at major championships at underage level and has relay experience.
What the AAI should do now is that instead of breaking the heart of Catriona Cuddihy by now telling her she's off the team, they should include both girls and drop Jessie Barr from the squad of 6. This sounds drastic but it's not. Barr should instead be sent to London in the 400m hurdles with her B-standard for that event and in doing so she can still compete in the relay team without being named in the squad of 6.
The AAI are making bad judgements now on a regular basis that are clear to even casual followers of athletics let alone to the knowledgeable fan or the athletes themselves. They need to sort out their act, it's not fair on the athletes and after all they are the priority.