For the two people here who might be interested. Contains some historical background of possible interest too.
http://research.gold.ac.uk/14533/1/PDF_Proof.PDF
It's an academic paper, so it has to be long.
Summary: Basically the super-rich are modernising old properties in ways which the old Highgate professional and academic elites find distasteful and vulgar, and complex and expensive legal battles ensue between the old upper-middle classes with their sense of community and respect for the historical aesthetic, and the new furrin neoliberal oligarch and high finance types who object to these fuddy duddies standing in their way of doing what they damn well please!
Summary of the summary: It's Thatcher's fault. Again.