I am a Senior Research Fellow at the Institute of Cosmology and Gravitation. I study the properties of dark energy, dark matter and gravity using data on the large-scale structure of the Universe gathered by galaxy surveys performed on the world’s leading telescopes.

My research is funded by the Science and Technology Facilities Council (STFC) and previously by the European Commission.

My research covers theory, simulation and observational cosmology, with a focus on methods of analysing galaxy survey data to obtain cosmological information. I use a combination of many techniques to achieve this, including redshift-space distortions, baryon acoustic oscillations, gravitational lensing and secondary CMB anisotropies. I am particularly interested in the use of cosmic voids – low-density regions identified in 3D maps of the galaxy distribution – as exciting tools to enhance the effectiveness of all these analyses. I also work on models of decaying dark matter and inflation in the early Universe. 

Part of my work takes place within the following international survey collaborations:

• the ESA Euclid Consortium
• the Dark Energy Spectroscopic Instrument (DESI) survey
• the extended Baryon Oscillation Spectroscopic Survey (eBOSS), part of the Sloan Digital Sky Survey (SDSS-IV)
• the Dark Energy Survey (DES)