I think it's a bluff. In the end, I don't think he has the power to ignore Parliament passing confidence in a new Government, otherwise what would stop someone doing that upon losing an election other than moral weight?
The Queen can send in the guards to turf him out if needs be

---------- Post added at 11:44 ---------- Previous post was at 11:43 ----------
Quote:
Originally Posted by BenMcr
That's covered in the link above I think:
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But again that precedes Parliament passing confidence in someone else. If they've done that how can he hold on?