There is an exception to the new rules and that is if you DO NOT have to have a phone line and broadband from the same company.
So if you had your phone line with say BT Retail already and wanted to move your broadband to another provider. if they do not require you to take their own phone line offering then they do not need to list the pricing including phone line rental (as they would not know what you are paying for the phone line)
I hope this makes sense.
And that is the reason that the rules such a stupid idea. It just adds yet another pricing structure into the fray.
Totally ill thought out by a bunch of people who failed to understand the telecom/BB infrastructure setup and all the combinations that are possible between phone, line rental and BB