Professor Anthony Staines:

It would make sense to expand the advice with a list of practical examples. We have not done so in this short document, but we have considered what might be necessary travel and what might not. For example, if someone is travelling for work and has to work in person at his or her place of work, that is essential travel. However, if that person could work from home, and it is feasible for him or her to do so, he or she should not travel. Working from home may not be feasible for everyone doing the same job. One person may be able to work from home while another may not.