Normalised evolution of the LoS magnetic flux through time for the 111 (out of 627) strong bipolar EUV brightenings identified using our base pairing (m = 5 and B_th = 20 G) that display strong (thresholds of ±10¹⁵ Mx s⁻¹) evidence of cancellation (54) or emergence (57). Left panel: Normalised evolution of the LoS magnetic flux within the SDO/HMI sub-FOV used to categorise EUV brightenings for the 54 events found to have a cancellation rate below −10¹⁵ Mx s⁻¹ (light grey lines). The overlaid dashed lines plot three example time series. The solid black line plots the normalised flux at each time-step averaged over all 54 events. Right panel: Normalised evolution of the LoS magnetic flux within the SDO/HMI sub-FOV used to categorise EUV brightenings for the 57 events found to have a emergence rate above 10¹⁵ Mx s⁻¹ (light grey lines). Once again, the dashed lines plot three example time series and the black line plots the average time series.