Ok I think some people need to calm a little. Yes impersonating a solicitor is mental but the serious punishments above are for people who do a bit more than send a woefully amateur attempt at a solicitors letter.
You need to have coerced money from another party under the guise of being a solicitor, for it to be considered a serious crime, or practiced law while not qualified.
Unfortunately, sending an email pretending to be a solicitor doesn't amount to illegal activity.
She was harassing Red Dutchess and attempting to dismantle her business - that would be the avenue I would go down if I was Caroline, but probably not worth the time and money to chase something like that.
Tbh, Caroline probably did more to Joanne by outing her again, than any damage Joanne attempted to do by sending fake solicitor emails and letters. Her brand collabs will be contacted regarding her behaviour, and she's embarrassed herself publicly for the millionth time. Hit her where it hurts, in her pocket, and contact brands that you see collabing with her.
She needs help, but this kind of thing has happened before with Joanne, and she's swept it under her h&m carpet.
It's car crash stuff, I would be worried what will happen to her over the next 12 months, because that lad is not going to be hanging around.