![[J.R.Helliwell]](https://www.iucr.org/__data/assets/image/0017/73160/jrh2.jpg)
Every two years, the Young Crystallographers Group of the British Crystallographic Association nominates a speaker to give the prestigious Kathleen Lonsdale Lecture. Traditionally, the group invites a respected scientist who has a good rapport with students. In 2011, John Helliwell of the University of Manchester gave a presentation on The evolution of synchrotron radiation and the growth of its importance in crystallography.
![[presentation]](https://www.iucr.org/__data/assets/image/0005/73157/lonsdale_lecture.png)