The British author Peter York[?] coined the term "Sloane Ranger". His book the Official Sloane Ranger Handbook (co-authored with Ann Barr) described the lifestyle of upper-middle class young women living in west London.
The archetypal Sloane Ranger (as described by the book) was Princess Diana before her marriage to Prince Charles
... out with 25.2% under the age of 18, 4.8% from 18 to 24, 27.3% from 25 to 44, 28.7% from 45 to 64, and 13.9% who are 65 years of age or older. The median age is 41 ...