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For the latest in multi-stage high pressure, high altitude water powered rockets, this group is paving the way: https://youtu.be/xm-tGJxepUw?si=uGA--H1kPgBCVREd

That is pretty impressive. Large empty spaces like that are a bit hard to come by in the UK.

"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%)."

Perhaps I should have said "large empty spaces where you can launch a sizable rocket".