Ask the site!!
I’ve stayed there but I couldn’t say what pitch number without finding the diary, I didn’t say in my review.
The site is located above the sea cliff & nowhere near a stream, not your classic flooding scenario, but I guess there might be run-off from the statics area after very heavy rain. We certainly had no problems though.
In short, don’t worry. If the pitch floods, it’s probably the least of your problems: but contact the site for reassurance.
Amazing family weekend with old steam engines, classic car displays, market stalls, and full catering and bar. And camping on site - Save £25 by booking in advance.