Links to current OPD Planning Policy and related matters:
TAN 6 (full, inc OPD) https://gov.wales/technical-advice-note-tan-6-planning-sustainable-rural-communities
One Planet Development (extracted from TAN6) One-Planet-Development-TAN 6.pdf
OPD Practice Guidance – https://gov.wales/planning-permission-one-planet-developments-open-countryside
Footprint Calculator – https://gov.wales/one-planet-development-ecological-footprint-calculator
Well-Being of Future Generations act– https://gov.wales/guide-well-being-future-generations-act-easy-read
Welsh Government links – https://gov.wales/planning-sustainability-presumption-favour-sustainable-development
The ten principles of One Planet Living – https://www.bioregional.com/resources/one-planet-living-principles
The Lammas website also offers useful historical reference for matters related to One Planet Development.