A thousand acres of London's super-prime real estate is owned by 5 aristocratic families, the Crown & the Church
Who owns central London? – Who owns England? https://whoownsengland.org/2017/10/28/who-owns-central-london/
In 1925, the radical journalist W.B. Northrup published a postcard
depicting a giant octopus, labelled ‘landlordism’, spreading its
tentacles across London. Each tentacle curled around the boundaries of
one of the Great Estates in possession of central London, listing their
acreage and yearly rents. (You can see it pictured above.)