Nightmare looking for venue seating - 200

I know a lot of Hilton Hotels can do this but if you are looking for something more bespoke you may struggle with the numbers as most barns etc are 100 to 150. Maybe look at stately homes with larke banquet halls that allow outside catering and see if you can get a good halal caterer seperatly

We have our indian wedding with 200 ppl at a hotel just outside Coventry with outside catering. It's the windmill

You might be better off finding a DIY venue that allows for your own caterers