Ms Orla Hegarty:

On pubs, that is why we measure it. Some pubs may have great systems, and let us find out where they are so we can open them.

On aircraft, there has been a lot of different information. It depends on the age of the plane, the number of people in it and how good the system is. It seems that some of the risk is when it is parked at the gate, when it is taxiing and when people are getting on through air bridges. It appears that unsafe air conditions can arise there rather than in mid-flight. We need more information. In principle, were people to be wearing good quality masks on aeroplanes and were there independently verified ventilation and filtration, it would be possible to engineer a relatively safe solution if the industry was minded to do that.