Hi OP, I've got some experience with Clare's Law through my work and it is unlikely that the meeting on Monday will be for a disclosure. The process involves making an application, as you have done, and then a decision will be made as to whether or not to progress with the application. For example, someone who has been on one date with someone and there is nothing to suggest that person may be violent could make an application but it would be unlikely to be progressed. However in your instance you've already been a victim of abuse which unfortunately can put you at risk of being a further victim. Equally, you're with a male who has already admitted a violent past, albeit "just pub fights". This would warrant further investigation so the first step would be to confirm your identity. Unless you have already done that, then that's what should be happening on Monday.
Once your ID is confirmed and they are happy that you are who you say you are and that you are the person that would require the disclosure (because other people can do it on your behalf but they wouldn't be entitled to any information) then a risk assessment is completed, including looking his history. This will not have been completed yet. Once this is done, it is referred to a multi agency forum and only then is a decision made to disclose or not.
Regardless of what the meeting is for on Monday, whether its just for confirming ID or not, please don't think this is me saying "oh it'll be fine!" This man has already told you he is violent. I have seen the phrase "when someone tells you who they are, believe them" so many times and in the last two years have learnt that lesson the hard way. Consider whether a violent man is someone you want in your life, and your children's lives.
I've attached the Clare's Law workflow from Home Office guidance, hopefully my post explains it a bit more.