We've had a call around our research group to collate all 3d printing resources we have together with a view to start printing for the nhs. Luckily enterprising students nicked/took home the printers when the university locked down so they're still usable.
This is a link to the 3d design that we are printing. It has photos of the finished product. I'm only printing the main headband part.
Once you have a batch ready to go, DPD will pick them up for free and take them to be assembled in Sheffield (i think).
I've only printed one so far, with four more on the way. Still dialling in the settings. Will post a timelapse video of them being printed later on.
https://www.prusaprinters.org/prints/25857-prusa-face-shield
Edit: This is the UK group doing the coordination https://www.prusaprinters.org/group/3dcrowd-uk-mb5KPRn