I'm aware of that and did so but was never questioned during my interview. I guess Wales is not a hostile country like Israel.
When I lived in DC, I filled out at least one foreign contact report a week from cabbies, waiters, etc.
When I got my security clearance renewed I got asked about stuff prior to my initial security clearance. The investigator was a babe, but she was tough on me. I thought she was interviewing to marry me. ;)