Parking Eye issued a "fine"

[Niall]

If you're worried about not paying, write back and ask them to prove you were driving, as the fine is levied against the driver, not the registered keeper. They'll write back asking you to declare who was driving, and you just write back to tell them you have no legal obligation to do so, and ask them to prove you were driving themselves. Boom, no more contact.

that's a nice point actually; shall include.

You won't shake off Parking Eye with that. They will just pursue the registered keeper quoting Protection of Freedoms Act 2012.

But they have no right or power to claim information under the freedoms act. Hence you can tell them to do one. But still, they will just keep hassling. Ask for proof of calibration and loss of earnings and they will go quiet.