The call centre in question is run by a company called Sitel. They are a company who other companies outsource call centre work to. I used to work for a company who outsourced some of their work to Sitel and I went to the local Sitel office to deliver some training. Based on that I am not surprised that there has been an issue, the management didn't give a shit about the workers, worked them all the hours they could get away with for minimum pay, treated them like shit and crammed as many people into offices as they could, basically treating them like battery chickens. From speaking to a friend recently who has done work for them things haven't changed a bit. He said, and I quote "if the HSE did a covid risk assessment right now, they'd be fucked"