Box spaces of the free group that neither contain expanders nor embed into a Hilbert space, with Thiebout Delabie, to appear in Advances in Mathematics.
Coarse fundamental groups and box spaces, with Thiebout Delabie, to appear in Proceedings of the Royal Society of Edinburgh Section A.
Expanders and box spaces, with Alain Valette, Adv. Math. 314 (2017).
Embeddable box spaces of free groups, Math. Ann. 360 (2014).
Expanders and property A, with Nick Wright, Algebraic and Geometric Topology 12 (2012).

On wall structures and coarse embeddings, expository article for the Metric Embeddings: Constructions and Obstructions Fall School at IHP, Paris.
Embeddability of generalized wreath products and box spaces, with Chris Cave and Dennis Dreesen (2013).

Coarse Geometry and Groups, PhD Thesis, University of Southampton, 2012
Groups of Polynomial Growth, Part III Essay, University of Cambridge, 2008