For Heaven's sake let's get real. In spite of the supposed restrictions of the Wilson Doctrine (
https://en.wikipedia.org/wiki/Wilson_Doctrine ) even our own 'side' have been taking more than a passing interest in the doings of our MPs over the years.
It has been the nature and indeed job of foreign 'agents' to nurture friendships with MPs, Civil Servants, military personnel at ALL levels etc. It's what they do!
It has also been expected that such 'approaches' would be reported.