I tend to shy away from politics because it's driven by emotion and it can get so heated, but here is my opinion: Rosie doesn't fit in with the party she's a member of because she's old school Labour, while the current arrangement of Labour is new Labour. I believe new Labour started under a certain Anthony Lionel Blair. Unfortunately with modern politics being as murky as it is, I consider all parties to be different sides of the same pile of steaming excrement anyway and in such, every ballot paper that has passed through my hands since around 2016 has been spoiled. Many of today's politicians will always walk back on their promises once they've won and got power. That's just modern politics.
Until both major parties reform, or dare I say, general modern politics reforms, there will always be crazies trying to destroy boundaries.