I participated in an event at King's College London and Antifa showed up.
Video
Sources
http://www.thenationalstudent.com/Student/2018-03-05/king_s_college_london_has_been_evacuated_after_gas_bombs_were_set_off_and_security_guard_sent_to_hospital_with_head_wounds_during_protest.html
https://www.youtube.com/watch?v=mimzjSAthcE
https://www.facebook.com/Kingslibertarian/posts/1726193344114130
https://www.facebook.com/KCLActionPalestine/posts/1134486310015562
http://thebackbencher.co.uk/exclusive-with-sargon-event-organiser-antifa-violence-shuts-down-event/
http://www.thenationalstudent.com/Student/2018-03-05/king_s_college_london_has_been_evacuated_after_gas_bombs_were_set_off_and_security_guard_sent_to_hospital_with_head_wounds_during_protest.html
http://www.washingtonexaminer.com/antifa-mob-shuts-down-yaron-brook-event-at-london-college/article/2650738
http://www.dailymail.co.uk/news/article-5466359/Several-people-hurt-thugs-shut-FREE-SPEECH-event.html
https://reason.com/blog/2018/03/05/antifa-shut-down-a-planned-debate-betwee
http://www.breitbart.com/london/2018/03/06/watch-masked-antifa-attack-student-free-speech-event-injure-vandalise/
https://www.rt.com/uk/420563-antifa-alt-right-kings/
http://dailycaller.com/2018/03/05/antifa-kings-college-london-ayn-rand/
https://twitter.com/MrAndyNgo/status/970765638833651713
http://dailycaller.com/2018/03/05/law-students-christina-hoff-sommers-fascist/
https://www.youtube.com/watch?v=mimzjSAthcE