@DD.
As with most things developed by the FSA, the answer is yes, no, and maybe!
In a very small nutshell, for existing contracts in place on 31.12.12, then commission/trail will continue as is. So, if you transferred into an existing PPP/GPPP, then it is likely that commission would still be available, subject to the product provider continuing to pay it of course!
If you make an alteration to an existing product, fund switch for example, then trail currently being paid could be renegotiated between you and the adviser, again, subject to the provider being able to cope with the change.
For brand new investment/pension business post 31.12.12, then no "commission", as such is payable, but most providers can cater for what will be called Adviser Charging. In other words, any payment agreed between you and the adviser can be deducted from the investment. This already happens in reality, except it is disguised by allocation rates, exit penalties and the like.
Of course, the above only applies if you actually purchase a product. Fees have always been payable for pure advice, once a clients agreement has been reached.
Advice has never been "Free", I am afraid.