Similar situation for myself, unfortunately the door was left open last night for companies like ours to simply say 'business as usual'. They have introduced distancing measures but it's totally impossible to implement properly in a building the business has completely outgrown (we were due to move to a much larger site in a couple of months)
Being owned by Americans doesn't help either, that's why it was so gutting that the decision wasn't taken out of their hands with the announcement of a proper lockdown.