Every SF86 I've filled out has required you to list foreign contacts. Period. Not even specific to state representatives. Neighbor down the street from RSA? List it. Play golf with a Brit? List it. The point of the questions is for you to open your soul to the point you prove yourself trustworthy. ANY omission or facts left out are a huge red flag. At best, you're a forgetful nincompoop. At worst, you're trying to skirt something. Either way isn't exactly encouraging in someone you're supposed to be trusting with high level secrets.
This stinks to high heaven.