Apologies if what I post isn't 100% accurate - I need to look deeply into the details - but my understanding is there is, and always was, a requirement to inform the fact that commission is received (even if not asked), but not a requirement to reveal the amount of that commission. BUT the crucial factor is, if a motor dealer offers >1 finance offering, or a variable finance offering, they must indicate the best one from the perspective of the customer, not the best one from their £ commission. And it was possible to sell increasing DiC (difference in charges) or decreasing DiC finance, and earn more commission. Put simply, its to do with certain motor dealers being able to unfairly alter the split of money earned between the dealer-finance provider, at the expense of the customer, rather than the market able to function normally and set the cost of finance in a more appropriate fashion.
Larger dealers (think.....big franchises) would act as price-setters, while small car dealers who offer someone else's finance are effectively price-takers.
Somewhere will be a list of the "worst offenders" and I imagine the people who are on the list, know they're on the list. And we'll see over the next few months/years, a gradual increase in the amount of info in the public domain, as claims management firms etc gear up for this latest opportunity.
They will apply because historically, when the PCP was sold we were either in the EU, or under the transitional arrangements which basically carried almost everything over for the interim. The rules at the time will always apply to historical agreements, can't make legislation which retrospectively makes something legal or illegal except in exceptional circumstances.....