That sounds like it could possibly be TikTok Roussette!
As I'm now on this thread, I'm going to respond to this post below by @Butterymuffin as no one has and I can answer her question.
I'm not a legal eagle, but I thought that anyone bringing a court case against someone else could withdraw it at any time if they wanted. Settling out of court is different as both sides have to agree to it. The Mail on Sunday haven't done that as they presumably think they will get enough out of going to court not to give in and settle. However the Sussexes could walk away with no settlement if they just changed their minds about the whole thing, so they are presumably set on going ahead now. Happy to be corrected if anyone can show the actual legal position.
It's not easy to withdraw a court case that you started at any time. This is for the obvious reason that you can't allow claimants to start legal claims and force the defendant to spend money and time working on their defence, only for the claimant to then drop it when the wind doesn't seem to be blowing their way.
So yes you can withdraw, but you're highly likely to face a very big costs order against you, i.e. you'll possibly have to pay all of the defendant's fees. This would mean the law suit would heavily cost them financially, as they'd be paying both their own and the other party's legal fees without any settlement or damages.
What's not being said much at all, and I think that's because people haven't looked into it and/or just don't understand, is that Friday's hearing is a strike out hearing. Associated Newspapers applied for an order striking out part of Meghan's claim, and that is what the judge will decide on Friday. Presumably the reason they're asking for parts to be struck out is because it doesn't meet a specific legal 'test' or is irrelevant.
However the point that Associated Newspapers are doing that means that, for now at least, they're on the front rather than the back foot.
It's going to be a very interesting case law-wise.
Here's a Press Gazette article about the hearing