Indeed. Perhaps 34D assumed, from its name, that the 'Victim Surcharge' sum is paid to the commercial 'victim', i.e. normally the Prosecution. However, it is awarded to central funds which are distributed through various schemes (some are even quite worthy).
Looking at the question of double liability, then it remains technically possible for a Prosecution to e reopened with substantial, new, evidence. However, the terms of an Out of Court Settlement should include an understanding that the matter is closed and an undertaking that it will not be pursued further. We really shouldn't ecome too concerned about the inter-company prosecutions; this sort of situation can arise in all sorts of matters in which there are more than one aggrieved party : nuisance, misrepresentation, theft, criminal damage, etc. in each case a Prosecution being possible whether brought by an individual or the CPS.