When I wrote the original Official Sloane Ranger Handbook with Ann Barr more than 40 years ago, we said the must-have postcodes were SW1, SW3, SW5, SW7, SW10 and SW11, in that order. Ten, even 20 years ago those areas were becoming unaffordable for most Sloanes. This started happening as the city changed and those new people — new kinds of plutocrats, people working in advertising (like the famous Saatchis), media and expat Americans in giant banks and corporations —bought them up. And they hoovered up W11.
