My good friend and neigbour had driven me to various hospital appointments throughout lockdown. She remains in her car while I am in the outpatients'.
If we leave the car we both put on a mask, but we do not wear them in her car. Legally, we are only obliged to do so in public transport.
If she had not been prepared to drive me to these appointments, all of which are 35 km from my home, I should have had to travel by four different buses to get there and back, spending an hour and a half each way in buses with about 15 total strangers.
Instead I spent half-an -hour each way with one person, knowing that both of us had tested negative within the previous 24 hours.