X-ray (red circles), host-subtracted, absorption-corrected, UVOT-UVW2 filter (blue squares) and bolometric (green diamonds) luminosity light curves. Bolometric luminosities have been calculated from fits of a Comptonised thermal disc model to the X-ray spectra (see Section 5.1). Solid red line gives a fit of constant flux in the early phase and a decay of t^−5.2 from day 100 to the X-ray luminosity. Dashed green line gives the same for the bolometric luminosity with a decay of t^−4.6. Grey vertical dashed lines indicate the times of the radio non-detections.