No one could have predicted the level of demand and the duration it would be required for.
Except they actually did. Feb 2016, just under 4 years before the covid-19 pandemic, the UK government ordered a pandemic planning exercise to highlight actions that needed to be taken to prepare the country for a respiratory (Coronabvirus) outbreak.
Observations from that exercise...
"Level and use of personal protective equipment (PPE) was central to the exercise dialogue and considered of crucial importance for front line staff. It was noted that the leaming from Ebola on infection control understanding, although improved, is still not embedded with staff. Clear instruction for PPE level and use was recommended. Access to sufficient levels of appropriate PPE was also considered and pandemic stockpiles were suggested as a means to ensure sufficient quantities were available."