That all grants and promises of fines and forfeitures of particular persons before conviction are illegal and void.
A problem that we have recognised and dealt with before:
"Clause  No Freeman shall be taken, or imprisoned, or be disseised of his Freehold, or Liberties, or free Customs, or be outlawed, or exiled, or any otherwise destroyed; nor will we pass upon him, nor condemn him, but by lawful Judgment of his Peers, or by the Law of the Land. We will sell to no man, we will not deny or defer to any man either Justice or Right." (Magna Carta, 1297 version)
This was amended in 1354 by Edward III to read as follows: “. . . no man of what estate or condition that he be, shall be put out of land or tenement, nor taken, nor imprisoned, nor disinherited, nor put to death, without being brought in answer by due process of law.”
And of course the Bill of Rights of 1689 gives us the headline. How careless of us to forget.