"As at April 2022: 8.7% of land in England is of developed use, with 91.1% of non-developed use and the remaining 0.2% being vacant.

The top 3 land use groups were ‘Agriculture’ (63.1%), ‘Forestry, open land and water’ (20.1%), and ‘Residential gardens’ (4.9%)."

https://www.gov.uk/government/statistics/land-use-in-england...