The primary thread of exchanges may be viewed at this link. The "branch" discussion covering the misrepresentation of the cost of calling 080 numbers may be viewed at this link.
Under the current draft BIS regulations (#39), companies will not be able to use 080 numbers for customer enquiries and complaints for the time being. They will not become "a non-geographic number to which, under the OFCOM requirements, calls must be free of charge" until the currently proposed Ofcom requirement for them to be free of charge comes into effect. This will not happen until at least 9 months after the Consumer Rights regulations.
“Customers they [SSE companies] already have a relationship with or potential customers who have previously agreed to a call” is a fair definition of those who are not covered by the provisions of PECR #21. Consent to unsolicited voice calls in person is assumed unless the number is registered with the Telephone Preference Service.