Happy to get behind that, @BasiliskStare.
Several different but parallel thoughts in my head on this -
If anyone (lawyers, Hacked Off, or Harry) misled DL (or anyone else) that is horrendous. I hope, as @Baital says, there would be some mechanism for redress.
I hope each claimant has done their own due diligence and are happy to stand over what they say in court - because they will be held accountable.
There may be some evidence, but it may not be enough to prove the case 'on the balance of probabilities'.