Earlier quoted context omitted.
It doesn't matter whose business it is, the BBC still can't use communication between you and the BBC to interfere in a relationship you have with your employer that is illegal. https://en.wikipedia.org/wiki/Tortious_interference
An analogy I have in mind might help. Say I write book arguing that a marginalized group are in fact responsible for all the evils in society. A publisher chooses to publish that book. Someone decides to send my boss a copy of the book and I get fired. Do I have cause to sue the sender for tortious interference? I don't know what the status of private communications with the BBC would be in this regard, but if you're…
Think of it like this: If I'm a web developer and I haven't received payment for my services I can withhold those services or even retain control of the product I am providing or use the courts to enforce the contract, but if I used the client's credit card info to enforce fines and pay myself I have broken the law regardless of whether I put it in the contract.