My noble friend makes a very important point. Even though a number of countries have been declared polio-free, including the UK because of our high level of polio vaccination, we should be clear that it has been detected and it has derived from someone having had a polio vaccine, probably an oral vaccine—the sugar cube that many of us will remember from our youth, rather than the injection that a person receives now as part of their 6-in-1. That has the potential to spread, and it is why the UKHSA is monitoring it. The important message is to remind everyone: check your red book, check your medical records, check your vaccination record. If you have not been vaccinated against polio or have not had the booster, go to your GP and get it as quickly as possible.