It’s a glorious, golden autumn day in west London and, after admiring the hedge-funded homes and beautiful babies in Bugaboos on a stroll along Notting Hill’s side streets, I arrive early for lunch with the publisher and philanthropist Sigrid Rausing. This is her neighbourhood – she has a house in nearby Holland Park with a garden that is reported to be the second biggest private garden in the capital, after the Queen’s – and her offices are near here, too.

Rausing, a 47-year-old Swede, inherited a fortune from milk cartons. Her grandfather co-developed the famous triangle-topped Tetra Pak container in the 1940s. In 1995 her father sold his 50 per cent share of the business and is worth $10bn, according to Forbes magazine. But she is no idle heiress. She initially wanted to be an academic and gained a PhD in anthropology from University College London. Since 1995 she has run her own charitable trust giving away some £20m ($33m) a year in grants to international human rights projects.