What Powers & Prerogatives does the Monarch still have, and when are they exercised?

[PrinceOfCanada]

Yes, but she does have the power herself to refuse assent for debate. It seems pretty clear that if she were to refuse assent for a bill it would provoke a constitutional crisis--the last monarch who did so was Queen Anne. But refusing assent for debate.. I dunno.

[wbenson]

She doesn't have any independent power (that she can exercise in reality, at least) to refuse consent for debate that she doesn't have to refuse assent to bills. It's the same deal. Not doing as her ministers advise (at least on a bill of any substance) would cause the same constitutional crisis in either case.

[Whig]

Would it be possible and/or feasible that the Queen would not give her assent to the new treaty that would in essence form an EC that is one government thus preserving British independence? I was thinking of the Queen Anne and when she refused to give assent for what, I believe, would be similar to the current bill/treaty.

[wbenson]

No. She will do as her government advises. It is a matter to be resolved by politicians and the public through elections, not by the Queen.