The Government has published its plans for the most fundamental changes to the English planning system since the 1940s

The Government has published its plans for the most fundamental changes to the English planning system since the 1940s in Planning for the Future. Part of the evidence base  is our research on the value of planning obligations, published alongside the Government consultation on planning reform. Section 106 planning obligations and the Community Infrastructure Levy in England, 2018 to 2019: report of study:

https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/907203/The_Value_and_Incidence_of_Developer_Contributions_in_England_201819.pdf