Hi,
Harry, I might be able to CAT me, just please don't tell me toooo many details. Don't tell me who your employer is either.
In terms of dropping parts of your case for unfair/constructive dismissal - are you still employed by your employer? If you are, neither of these things apply and you will just go ahead with the sex discrimination. It sounds like this might be the case if they've suspended the consultation. However, the Judge can walk you through this in the hearing. This is the type of legal technicalities they will help you understand.
In terms of disclosure, you don't need to go in with a list of stuff. Both parties are legally obliged to disclose everything that they have that might be relevant, whether positive or negative. Neither you, nor they, can cherry pick. You can't ask only for stuff you think will be useful and you can't only give them the useful stuff. The judge can explain all of this to you in the CMD (and a good one will without you asking).
The only time you need to ask for 'specific disclosure' (i.e. a specific item) is if there's something you want that might not seem relevant to the case without it being pointed out. This is pretty rare. One example might be that, if the employee has found a new job and you are suspicious as the employer that it really started earlier than they are letting on (so their compensation should be lower), you might ask for a copy of their offer letter in the new job.
In terms of time until the hearing, it will depend how busy the Tribunal is and how many days they decide to list the hearing for (longer hearings tend to be further of because of scheduling). I'd guess you're probably looking at four days+ for sex discrimination.