Useful links

National Planning Policy Framework

https://www.gov.uk/government/publications/national-planning-policy-framework--2

Planning Practice Guidance - Viability

http://planningguidance.communities.gov.uk/blog/guidance/viability-guidance/

London Plan

https://www.london.gov.uk/what-we-do/planning/london-plan

Mayor of London’s Housing Supplementary Planning Guidance

https://www.london.gov.uk/what-we-do/planning/implementing-london-plan/supplementary-planning-guidance/housing-supplementary

https://www.london.gov.uk/what-we-do/planning/implementing-london-plan/supplementary-planning-guidance/draft-interim-housing

The London Assembly Planning Committee investigation into viability

http://www.london.gov.uk/sites/default/files/london_assembly_planning_committee_letter_-_viability_assessments_final.pdf