What exactly do you want to disrupt (her death or the pageantry following her death) and why do you want to disrupt it? The most obvious way would be to find a

What exactly do you want to disrupt (her death or the pageantry following her death) and why do you want to disrupt it? The most obvious way would be to find a route to immortality and provide it to the Queen however I'm not sure of the value of that.