I would say, there is a very high chance of you being absolutely fine physically and a moderate chance of you being inconvenienced.
But depending on where you live and work, it could impact your ability to work and travel quite a bit if the virus properly infects the UK. I think the concern within Europe is that, because we have fairly good and well used public transportation links (say compared to developing nations), the virus could spread very rapidly and over a large distance. If this happens with a 2% mortality rate it wont start killing millions, but it'll probably inconvenience a lot of people. And if the markets continue to take hits, it'll trickle down and impact you in ways similar to that of other financial crisis.
This has never happened in the modern world, at this scale.