A Euromech colloquium, on interfacial processes and inhomogeneous turbulence, was held in London on 28–30 June 2010. Papers were presented describing and analyzing the influence of interfaces that separate turbulent/non-turbulent regions, between regions of contrasting fluid properties, or at the edge of boundaries. This paper describes a summary of the work presented, giving a snapshot of the current progress in this area, along with discussions about future research directions.