Earlier quoted context omitted.
That "woman of great importance in the UK government" is the Prime Minister. For the purpose of this discussion, and until she's voted out, she is the most important person in the United Kingdom.
10-4. Why is she being resoundedly disapproved upon by her own gov't? Presumably, the same gov't that put forth this vote? At least some significant margin of politicians must have wanted this vote knowing that 'yes' is on the table. Where are they?
Because "Prime Minister" is not the head of state, so there's little respect for the position. Her position is equivalent to Speaker of The House in the US, only in a system where The House is also the Executive.