Thanks @Sumo @Velocio! Both good shouts. Main issue seems to be finding webcams and mid-range headsets but those are nice, not urgent. Assume they've been bought up as people/businesses transition to WFH (i.e. partner's firm bought and delivered ~600 Chromebooks to staff on Friday!).
I'll hold off those for a few days and just sort the other 'essential' bits (another keyboard, HDMI>DVI cables, USB hubs, other misc bits).