This was mentioned in comments under Criminal transmission of COVID-19? Knowingly exposing vulnerable individuals however, my question involves UK law and a more direct, intentional act that could not be confused with negligence or accident.
It is a specific circumstance, known to have already happened - one example I managed to find from The Guardian. There was a more recent case but I have failed to track it down.
If someone spits &/or coughs at you intentionally, knowing they are infected, is this attempted murder?
Of course, the chances of you actually dying are quite small, but they are not zero.
To take a rather over-dramatic parallel - if I were to load a revolver with a single bullet, spin the cylinder, aim it at your head and pull the trigger, would that be attempted murder? The odds are considerably shorter, but the outcome is the same - you live or die by that single act.