In early February an experienced business client in the property sector warned Mark Walsh, the managing partner of law firm Eugene F. Collins, that the fallout from Covid-19 was going to be catastrophic. At this point, fewer than 50 European cases of the virus had been confirmed. Walsh says his first reaction was to dismiss the client’s fears as alarmist but soon the truth of what he said hit home. “You know when you hear something you don’t want to hear, you process that piece of information. And you kind of go away and you think, ‘Wow, it really is…