As we finalise our sixth year of the #OneLess experiment in London, we’re looking to diversify the reach of our approach by sharing our learnings and experience with other change-makers around the world. This year, we’ve been busy creating #OneLess – a practical guide for tackling ocean pollution at source to support and empower others in applying systems change approaches to their own environmental challenges. 

Last month we hosted two online webinars to officially launch the #OneLess practical guide with a global audience (September 2021). The webinars catalysed discussions around systems thinking, stakeholder engagement, driving policy change and surfacing ocean values, with great contributions from our attendees spanning 45 cities worldwide.

Below we have linked to the webinar recording – please feel free to download, watch and share with colleagues and networks that would benefit from learning about #OneLess London. 

For a very practical and effective model that is highly applicable to a wide range of contexts and cultures all around the world, please take a look at the #OneLess Practical Guide

Short on time? Skip ahead to the presentation that most interests you:

Systems change approaches – Anna Birney, Forum for the Future (0-17 mins)

  • Why systems change?
  • What are systems change approaches?
  • Collaboration
  • System boundaries
  • #OneLess theory of change
  • Multi Level Perspective
  • #OneLess interventions
#OneLess communications – Mirella von Lindenfels, International Programme on the State of the Ocean (17 mins – 23 mins)

  • Taking a values-based approach to communications
  • The single-use plastic water bottle as a flagship item
  • Connecting to the ocean
  • #OneLess tourism campaign
  • Adapting to the United Nations Ocean Conference in New York
#OneLess as a case study – Corina Angheloiu, Forum for the Future (23 mins – 27 mins)

  • Mapping the system
  • Rediagnosing the system four years on
  • #OneLess impact to date
  • Walk through of the #OneLess Practical Guide
Reducing single-use plastics: London’s Refill Revolution – Adam Batchelor, Greater London Authority (27 mins – 42 mins) 

  • Potential to cut plastic waste in London
  • Environmental impacts of plastic bottles
  • Drivers of behaviour change
  • London Environment Strategy 2018
  • Refill London
  • London Drinking Fountain Fund
#OneLess in the Philippines – Rona Joy Loma, Zoological Society of London (ZSL), Philippines (42 mins – 50 mins)

  • The issue of single-use plastics in the Philippines
  • Communicating and influencing change through public engagement
  • Intersection of #OneLess and community managed savings and credit associations


07 October 2021


#OneLess team