@Caramelsyrup why do you think you accepted his excuses when you caught him out before?
What did you think he and his friends would be doing on lads' trips to Hamburg, Amsterdam, and now Thailand? They are all notorious sex tourism destinations.
Given that he told you he'd used a prostitute before you married, and the 'call girl London' on his ipad, it's pretty obvious what he and his mates do.
Why is it different this time? ie you don't believe his excuses.
It seems pretty obvious that he enjoys using sex workers whenever he gets the opportunity, and so do his friends.
I think you can't fool yourself any more, and maybe now your DC are older you feel more able to cope on your own.
I would be accessing as much financial info as I could, just as a precaution. Take copies of any relevant paperwork, leave it all with a trusted family member or friend.
If you do divorce, he will have to provide details of his personal accounts on the Form E, so don't worry too much if it's online and you can't access it.
Definitely ask him to stay home and just go away with your daughter.
Good luck @Caramelsyrup , I think you are dealing with the shock of realising/acknowledging to yourself that he has probably been cheating for years with sex workers. Be kind to yourself. 💐