She can, but the last time a GB monarch did so was in 1708. In practice there’s a much more subtle way she can influence things; any bill in parliament which would affect the monarch’s private estate or income has to be proposed to her quite early on in the process, and can be quietly vetoed or altered at that stage. Same goes for any bill which would affect the interests of the duchy of cornwall: Charles gets to have a say on those. This arrangement has been kept very quiet by the court and by successive governments, but the Guardian is trying to expose it.
