On primordial gravitational waves
- Institute of Astronomy, seminar, March 2006.
- DAMTP cosmology seminar, June 2006.
- COSMO–06 conference, University of California, Davis, September 2006.
- Relativity Seminar, University of Southampton, February 2008.
On primordial black holes
- Institute of Astronomy seminar, November 2006.
On dark energy
- Bilbao Cosmology Conference, April 2007.
- DAMTP cosmology seminar, June 2007.
- Oxford cosmology seminar, October 2007.
- COSMO–08 conference, University of Wisconsin-Madison, August 2008.
- London Relativity and Cosmology Seminar, Queen Mary, University of London, February 2009.
On gravitational lensing
- Nottingham particle physics seminar, October 2009.
- Chulalongkorn University (Bangkok) physics seminar, January 2010.
- Oxford cosmology seminar, March 2010.
On primordial non-Gaussianity
- COSMO–2010 conference, Tokyo University, September 2010.
- Imperial College Cosmology seminar, October 2010.
- Chulalongkorn University (Bangkok) physics seminar, January 2011.
- UCL Cosmology seminar, March 2011.
- Institute of Cosmology and Gravitation, Portsmouth, September 2011.
- COSMO–2011 conference, Centro de Astrofísica da Universidade do Porto, August 2011.
- AIMHI Summer School in Astro-Statistics (3 lectures on statistics), Chiang Mai University, June 2016.
On 21cm cosmology
- University of Texas at Dallas, seminar, June 2012.
- COSMO–2012 conference, National Astronomical Observatories, Beijing, September 2012.
- University of Edinburgh, seminar, September 2012.
- Naresuan University (Phitsanulok, Thailand), Institute of Fundamental Studies seminar, January 2013.
On the Lyman-alpha forest
- Naresuan University (Phitsanulok, Thailand), Institute of Fundamental Studies seminar, June 2014.
- COSMO–2014 conference, Chicago, August 2014.
- University of Glasgow, physics seminar, May 2015.
On cosmic voids
- Naresuan University (Phitsanulok, Thailand), Institute of Fundamental Studies seminar, January 2015.
- Jeremiah Horrocks Institute, University of Central Lancashire, physics seminar, March 2015.
- University of Cambridge, GPE@60 conference, September 2015.
- COSMO-2015 conference, University of Warsaw, September 2015.
- University of Plymouth, Physics research seminar, May 2016.
- National Astronomy Meeting, Hull, July 2017.
- COSMO-2017, Université Paris Diderot, Paris, August 2017.
Mathematics outreach talks
- Royal Institution Mathematics Masterclasses, "Mathematics and Art" (April 2015) and "Geometry Surprises" (January 2016).