Evolution of the large surge associated with the central UV burst identified in Fig. 5. The top row plots the IRIS SJI Si IV 1400 Å intensity at six time-steps, with the overlaid blue box indicating the FOV plotted in Fig. 5. The second row plots the co-spatial and co-temporal FOV as sampled by the HRI_EUV telescope. The right-most blue box indicates the location of the other foot-point of the surge, whilst the overlaid blue arrows indicate the approximate location of the tip of the surge through time. The third row plots co-temporal HRI_EUV images sampled within the right-hand box overlaid on the second row. The overlaid blue box outlines the region where the intensity is averaged over to construct a lightcurve of this foot-point. The bottom panel plots this light curve (solid line), as well as the IRIS SJI Si IV 1400 Å (dotted) and HRI_EUV (dashed) intensities measured around the UV bursts at the left foot-point. The first vertical dashed line indicates the apparent start time of the surge at the left foot-point whilst the second vertical dashed line indicates the time at which the surge appears to reach the right-hand foot-point. A movie more clearly displaying the evolution of this region (combined with Fig. 7) is included with the online version of this article.