UK Security Experts - See Something Say Something 25 Years After 9/11

I've got an urgent source request. Writing a piece about the continued importance of "see something, say something," 25 years after 9/11 given what just happened at RAF Fairford. I'd love to chat with security experts about the topic, particularly interested in the answer to this question: After 25 years and billions spent on counterterrorism, why can the most sophisticated security system still depend on one person noticing something is wrong? Feel free to send any and all leads to [email redacted]