Ms Orla Hegarty:

We do not know in the absence of data. I did some spot checks in supermarkets using a CO2 monitor and, with a little bit of effort, most of them would be relatively safe. Some of the concerns about people being infected in supermarkets is because the people are not going anywhere else, but that does not mean that they were not in another unsafe setting, maybe on transport or in their own home, that they did not realise was unsafe.

In terms of workers in supermarkets, I would have a concern that in some places people are still working behind Perspex, which is not safe, and that they are sharing break rooms and toilets where they are not aware of the dangers of spread caused by just going on a break with another staff member or going to changing rooms. We notice very clearly a classroom or a supermarket and less so the back areas of locker rooms, staffrooms, toilets, lifts and corridors where the risk might actually be because there are pockets of dead air, somebody has passed through earlier and somebody comes through later and moves into the same space. We need a more joined-up approach more broadly than just the supermarket.