A lot of complaints and worries about how construction crews are not subject to lockdown and vulnerable due to need to work in close proximity.
How long would it take to write an app that tracks proximity between mobile phones on site? Building sites could distribute to site crew to help encourage/enforce social distancing.
1. App to be distributed to all visitors in addition to site crew.
2. Track distance between registered mobile phones. Duration, approx location.
3. If 2m distance is breached then a warning goes off on the affected phones. Logged and sent to site office / monitoring app.
The monitoring app would keep records so that if any of the site crew gets infected, the health service would be able to determine who would be at risk by rolling back the logs... Broad St pump-style?
Probably an imodel.js hackathon jobbie?