An estate agent on my local high street has around 10 staff working fairly close together (maybe 1.5m max and perspex screens between them, but no ventilation). Shouldn't they be at home? They're a chain and their website says they're working remotely speaking to customers by phone and doing virtual viewings. Perhaps they just decided to keep one of their offices open for staff who preferred not work from home or don't have the right kit - it's the only explanation that fits. I haven't ever seen the office so full in non-Covid times.