Back in today. Has fallen to the 200MA. Covid stocks (which this barely is) have been punished due to a rushjob potential vaccine that won't have completed trials until mid 2021. Looking forward to the next investment with all that lovely warrant cash.
That was two weeks ago so, no, it won't be anything to do with the vaccine. All companies provide these caveats on forward-looking statements. Nothing to see here.
I get the feeling that they knew they had to RNS something due to the price crash and investors contacting them. I also get the feeling that we're extremely close to big news: otherwise they'd have issued a bland business update. If you have to update us, why not about the business and trading? Because it's not quite ready to announce yet but they're about to blow the doors off.