For anyone who kites at Camber Sands, the tables say low tide's going to be 0.7m on Monday. How much beach do I get with this?

I've been there before to find 2/3m of beach to use so I don't want to make the mistake again.

Thanks

Edit: For anyone who's kited at Camber Sands, do you *need* insurance? Is it just a recommendation or is it a rule no one really bothers with?