[2] After graduating from Cambridge, she worked for seven years as a research assistant to geology professor Thomas Stanley Westoll at the University of Newcastle-upon-Tyne.
Andrews then returned to Girton College at Cambridge to complete her PhD thesis on fossil lobe-finned fish and also co-authored a paper on the subject in 1970.
[2] Her work, which focused on the fossil lobe-finned fish that would later evolve into the first land vertebrates, became the principal foundation on which research of the origin of amphibians is based.
[3] Andrews also made drawings of many of the fossils which she studied and travelled extensively including joining the first official palaeontology party to work in China in 1979.
[2] She was a Christian and when she retired early in 1993 due to ill health she bought a house on the island of Iona to join the religious community there.