Hagan Bayley is the Professor of Chemical Biology at the University of Oxford.

A major interest of his laboratory is the development of engineered protein nanopores for stochastic detection, including single-molecule covalent chemistry and ultrarapid biopolymer sequencing. Recently, the Bayley lab has developed techniques for the fabrication of 3D tissues, both living and synthetic.

In 2005, Professor Bayley founded Oxford Nanopore, which has manufactured the MinION portable DNA sequencer. Professor Bayley was the 2009 Chemistry World Entrepreneur of the Year. In 2011, he was elected a Fellow of the Royal Society. In 2012 he was awarded the Royal Society of Chemistry's Interdisciplinary Prize, in 2017 the Menelaus Medal of the Learned Society of Wales and in 2019 the Mullard Award of the Royal Society. In 2018, Professor Bayley held the Kavli Chair at the Delft University of Technology.