No.
It would not be surprising to hear of other, formal investigations being launched IF the PL proceedings against MCFC succeeded. However any prosecutions would have to be based on admissible evidence that was capable of being believed by a jury. The decision of a PL disciplinary panel has, in itself, no evidential value in actual court proceedings. So there might be an investigation but it would go no further than that.
What is said during the PL proceedings - ie the evidence given - might give rise to proceedings if sufficiently incendiary, but that is incredibly unlikely to happen. Fundamentally, in my view, prosecutions from HMRC and SFO are extremely unlikely because they would fail.
I'm not being unfriendly, but I'm not answering any more questions about possible prosecutions because the chances of that actually happening are diddly squat.