Cybersecurity communities. Small hacker groups, big impact

This piece surveys UK cybersecurity community groups—OWASP chapters, DEF CON groups, 2600 meetups, university hacking societies, and Meetup-based ethical hacking communities—outlining their focuses, formats (talks, workshops, CTFs, hackathons), and audiences from newcomers to professionals, and emphasizing benefits such as networking, hands-on learning, mentorship, CPD, and career opportunities.