Rooney doesn’t have to prove anything, she is the defendant, the burden of proof lies with Vardy who is bringing about the claim...So it is Vardy that needs to prove (on the balance of probabilities) that Rooney committed libel against her. Rooney does not have to prove that it was Vardy not an aide or hacker, it is Vardy that would need to prove it was an aide or a hacker (or otherwise provide a plausible explanation).
I found the posts, by girasol. I'm not a libel lawyer so I will obviously defer to those who are (as far as we can tell on here, of course). What she said initially was:
"Vardy is suing Colleen for libel so the burden of proof rests on Vardy to prove 3 things, that 1) words have been published 2) to third parties (ie not just said to her) and that the words are 3) defamatory of her, which means that they have caused or are likely to cause serious damage to her reputation. She has a slam dunk on all of these points. Then the burden of proof shifts to Rooney as a defendant to see if she can make out one of the recognised defences to a libel claim. If she can, Rooney wins, if she can't Vardey wins. Rooney has indicated that she intends to rely on the defence of truth. She has to prove, on the balance of probabilities (so basically more than 50/50) that it was indeed Vardey who was selling the fake insta stories to the press. In practice, however, it will be as much be Vardey who has to prove that it wasn't her, ie it that her account was hacked and someone else was doing it..."
I'd forgotten the bit about Vardy having to prove anything. I thought that as Rooney made the claim, she had to prove it if she was going to use the "truth" defence.
In a later post, after the court ruled that the post constituted an accusation against Vardy herself, girasol said: "However, the judge agreed with Vardy (and me!) that the meaning of the post was that Vardy was, as a matter of fact, guilty of leaking the stories. So that's what Rooney now has to prove to the court. Vardy just needs to muddy the water enough to undermine Rooney's case that it must have been Vardy who did it...I don't know much about what evidence either side actually has but if I was advising Rooney I'd be telling her to get out her chequebook, and exit sharpish...."
Link to thread: www.mumsnet.com/Talk/am_i_being_unreasonable/4084026-To-think-Rebekah-Vardy-has-no-chance
Perhaps Rooney has more evidence than we realised?