Llywydd, I thank Helen Mary Jones for that. I confirm that in the circumstances she has described it would be acceptable, but we do know that there is quite a lot of learning that the system has to absorb. It was one of the hesitations that the chief medical officer has always expressed about compulsory use of face coverings, that there have to be exceptions and we have to be sensitive to those people who for different reasons do not find the wearing of a face covering themselves possible or who find it difficult when others wear them. We will use all the exceptions that we put into place when face coverings were made compulsory on public transport in the new areas that we have made them compulsory as from Monday of this week, and there will, I'm afraid, be a short period in which sensitivity to some of these issues will have to be developed amongst people who haven't had to operate in this way up until now.