What free market?
This site is right in the middle of Brighton. It has been vacant since 1986, for most of that time with planning consent for development. A few months ago it was occupied by squatters who turned it into a garden. The owners promptly woke up, applied for a Court Order and got the squatters evicted. Then they applied a scorched-earth tactic and got a few truckloads of chalk dumped on the site.
This is the unacceptable face of the British property “industry”. Not very industrious, is it?