![Happy birthday Critical Mass! So how has it changed over the 20 years? | Ethical and green living | The Guardian Happy birthday Critical Mass! So how has it changed over the 20 years? | Ethical and green living | The Guardian](https://i.guim.co.uk/img/static/sys-images/Environment/Pix/columnists/2012/9/27/1348744730126/Bike-blog--Critical-Mass--006.jpg?width=620&quality=85&auto=format&fit=max&s=aa5c0b64d2f82168ce9bc495a79257b7)
Happy birthday Critical Mass! So how has it changed over the 20 years? | Ethical and green living | The Guardian
![CRITICAL MASS LONDON - Under Waterloo Bridge outside National Theatre, London, United Kingdom - Active Life - Updated March 2024 - Yelp CRITICAL MASS LONDON - Under Waterloo Bridge outside National Theatre, London, United Kingdom - Active Life - Updated March 2024 - Yelp](https://s3-media0.fl.yelpcdn.com/bphoto/8LTH-Gxl7ntVBFj3YUnEvw/348s.jpg)
CRITICAL MASS LONDON - Under Waterloo Bridge outside National Theatre, London, United Kingdom - Active Life - Updated March 2024 - Yelp
![Critical Mass London | Last Friday of every month, South Bank under Waterloo Bridge 6.00pm to leave 6.30pm Critical Mass London | Last Friday of every month, South Bank under Waterloo Bridge 6.00pm to leave 6.30pm](https://network23.org/criticalmasslondon/files/2014/01/cropped-banner1.jpg)
Critical Mass London | Last Friday of every month, South Bank under Waterloo Bridge 6.00pm to leave 6.30pm
![Critical Mass London | Last Friday of every month, South Bank under Waterloo Bridge 6.00pm to leave 6.30pm Critical Mass London | Last Friday of every month, South Bank under Waterloo Bridge 6.00pm to leave 6.30pm](http://network23.org/criticalmasslondon/files/2024/03/30thAnniversaryRidePoster-Medium.jpeg)
Critical Mass London | Last Friday of every month, South Bank under Waterloo Bridge 6.00pm to leave 6.30pm
a 30th anniversary bicycle ride for Critical Mass London! Tickets, Sun, Apr 14, 2024 at 12:00 PM | Eventbrite
![Extinction Rebellion Cyclists 'Swarm' Central London to Protest Insect Death - Extinction Rebellion demonstrators held a “Critical Mass” cycling event Stock Photo - Alamy Extinction Rebellion Cyclists 'Swarm' Central London to Protest Insect Death - Extinction Rebellion demonstrators held a “Critical Mass” cycling event Stock Photo - Alamy](https://c8.alamy.com/comp/T6CCRK/extinction-rebellion-cyclists-swarm-central-london-to-protest-insect-death-extinction-rebellion-demonstrators-held-a-critical-mass-cycling-event-T6CCRK.jpg)