My colleague, mentor and friend Heidy Mader, who has died aged 61 of cancer, was an outstanding experimental scientist. She applied lessons learned in developing the Wispa chocolate bar as a research physicist at Cadbury to lead a revolution in understanding the flow of lava and magma as a professor at Bristol University.
Heidy was born in Cosford, Shropshire, to Renate (nee Pitz) and Eric Mader. Eric was an officer in the RAF, and Renate, who came from Germany, went on to become a teacher. The family moved frequently within the UK, following Eric’s postings.
