Its how she always looks. Especially when she has to answer difficult questions.
She has several 'tells'.
The first is 'let me be clear'. This one should come with a klaxon alert because whatever comes next pretty much always means the opposite to what she actually means
The second is 'I would say' or a variation of such as 'I would tell you'. This means she is about to avoid the question and spout off about something completely different to what she was just asked.
Then when she really wants to avoid a difficult question she pops out the strong and stable like.
Ironically May is terrible under pressure and when put on the spot and these tells make her easy to read. Far from being strong, she has very obvious weaknesses in certain situations. She has a tendency to crumble rather more often than the Cons would like you to know.
Its precisely why they have kept her away from the public, preferring everyone else to run around shooting themselves in the foot whilst she remains aloof and doesn't make the same mistakes because she's not in similar situations where it goes horribly wrong.
The only way May can do things is through being in control of the situation. When she's not, she not in her comfort zone. She holds grudges and manipulates the situation rather than solving problems. This is how things will play out.
Everything is about getting her off the hook for the shit that will shortly hit the fan in a spectacular fashion and finding someone else to blame. So much for accountability.
Yet its still a surprise when people get a glimpse of what May is really like when she's exposed to the public.
sigh
We are screwed. In the national interest of course... Not because someone is vastly out of their depth.