In view of this "self-isolation" stuff, is the demand on home deliveries going to increase? I have never used one because I find it hard to hit their minimum payment amount, but I wonder if anyone has thought about the implications on the system. Shopping must be one of the major points of interaction between people, yet we have had nothing on what to do at the till. Should we all do swipe card transactions? How are you supposed to know that something you put in your trolley has not been coughed all over by someone with Covid-19?