Fig. 2

(a)-(b): a) Timeseries of number of people attending UCLH ED over the study period stratified by people arriving by ambulance and walking-in. There is a large drop in attendances that coincides with the imposing of the first national COVID-19 lockdown. While this drop is evident for both walk-in and ambulance patients, it is larger in walk-in patients. b) Timeseries of the number of people leaving UCLH ED within 4 h of arrival