My research interests are focused on the observational study of gamma-ray burst (GRB) afterglows and their host galaxies. I am particularly interested in using GRB afterglows as a tool to understand the evolution of faint starforming dwarf galaxies in the distant universe; and in using polarimetry, together with multi-wavelength lightcurves, to understand the physics behind GRB afterglows. Additionally, I have some involvement in studies of tidal disruption events, X-ray binaries and ultra-luminous X-ray sources as "local" analogues of (elements of) GRB physics. In recent years I have become interested in the electromagnetic counterparts of gravitational-wave sources. Observationally, my main interests are in optical and infrared techniques, particularly imaging polarimetry and (echelle) spectroscopy, using telescopes at La Palma, Hawaii and particularly the many ESO telescopes in Chile. I also keep a close eye on developments in radio wavelengths, and am interested in multi-wavelength tests of the physics of transient sources.