If I'm remembering correctly, the advertising restriction wasn't a law, but a - more evil - 'Hello publishers, as the government we think you should do this. If you don't, we might legislate. Just saying...'
Similarly, the not working together bit is at least a century old, although you could argue that by failing to implement the suggestion in her government's own response to the Paying the Price 'consultation' to allow two people to work together, as an ex-minister she carries some responsibility for the situation continuing.
She is one of those responsible for the 'let's make it impossible for clients to know if what they're doing is legal' law.