RE: Trading update.24 Mar 2017 12:48
Ahh yes, the Trump effect. That's certainly playing on the sector. The indecision of the repeal/replace Bill, general uncertainty, and there were some statements in "his" budget regarding withdrawal of funding from scientific research, which may also colour sentiment in general.
Being an optimist, I'm taking his influence as purely temporary as the US recovers from its temporary insanity / Russian coup.