http://www.dailymail.co.uk/news/arti...ce-cream-.html

Before entering politics, former Prime Minister Margaret Thatcher put her Oxford chemistry degree to good use with a research job at food manufacturer J. Lyons and Co.

Tasked with whipping more air into ice cream, she produced a type of ‘soft-scoop’ cream which could be pumped through a machine. It heralded Mr Whippy vans and the ‘99’ cone.