Self-isolation is relevant to anyone who is showing symptoms of COVID-19 such as high temperature and a persistent cough. It refers to people staying at home and not leaving for any reason. They should not go out to even buy food or medicine and should order these online or have someone drop them off at their home.
Local authorities have measures in place to support people who are self-isolating and who may not be able to have supplies brought to their homes such as those people who cannot use technology or those who do not have a family. In these instances, the local authority can arrange to have supplies brought to them.