Health Measures at UK Borders

I welcome the proportionate nature of the Home Secretary’s statement. May I take her back to the question I asked her during the urgent question yesterday? Given that these measures are to deal with the risk of a new strain of the virus coming to the United Kingdom that might not be susceptible to the vaccine, and given that the UK chief scientific adviser said that the virus will be with us forever, is this a permanent regime, with countries being added to and taken off the red list as appropriate? If it is not permanent, what is the trigger for removing it in the future?