It's actually 3 sites - a 20-pitch main commercial site, a 23-pitch adult-only commercial site and a 5-pitch CL which is presumably separate but adjacent to the other sites.
http://www.bronderw-wales.co.uk/
Not my idea of peace and quiet !
A small number of CLs do adjoin a commercial site but there's normally an entry in the Sites Directory Book and website details to that effect. It's probably more common in Scotland where they can have a CL next to their Crofting Act area - in one case with a C&CC rally field in between.
The CL at this site is lovely, nice pitches and excellent toilet block for use of CC members, both other sites also excellent, well kept with excellent facilities, owners work hard to keep up high standard.