Yes, they were. After Sally Clark was acquitted when new evidence turned up showing that the baby had died of meningitis (it wasn't even a cot death as such) and the events of the Trupti Patel trial, it became clear that parents who had suffered multiple SIDS bereavements should not even be suspected of murder in the absence of any substantive evidence. The system corrected itself and the two other women were declared to be innocent.
I thought that's how you agreed it works, Vixen. That if someone suffers a wrongful conviction then the appeals process will correct it. Here we have the appeals process doing just that, and yet you don't accept it.
There was never any evidence of murder in any of the four cases - Clark, Cannings, Anthony or Patel. Charging them with murder was a gross error that the courts were led into by Roy Meadows' arrogance and misunderstanding of statistics. It's grossly dishonest to imply that because these women were the victims of misguided charges (and then acquitted, Mrs Patel at the court of first instance) that they may still be considered to be guilty because "we can't know". On that basis anyone who has ever suffered a bereavement for which they don't have a cast-iron alibi may be implied to be a murderer.
The defence in the Sally Clark case argued for SIDS because they didn't know about the microbiological and cytological evidence of meningitis. Once they knew about that, of course the hitherto unexplained was explained and they moved on to that ground. Of course they weren't arguing for post-partum psychosis because Mrs Clark did not have that (although it's said she did have a degree of post-natal depression), and get this. That would have been a plea in mitigation. It would have involved admitting that Mrs Clark had actually killed her babies. Which the defence did not admit, on the very reasonable ground that she didn't kill them.
And once again, while I believe there is a thread somewhere about these cases, they have virtually nothing to do with the Lucy Letby case.