Carla Connor (Alison King)

[Perdita]

but Tracey was freed after the conviction was deemed unsafe? something about the expert witness at the time was discredited

That is what I mean .. it was a technicality that got her out. Guess they had to write it like that to get the character back.

If Rob is out as well now, I can´t wait to find out the reason but maybe we see him behind prison bars rather than walking down the cobbles??