I thought the British Monarchy "Reigned but do not Rule"

Apparently, it is Reign, veto and maybe rule. [Link]

UK government ministers have been secretly offering Prince Charles a veto over proposed legislation since 2005, under a little-known law that gives the prince the right to silently kill or amend legislation if it might negatively affect his interests. The legislation the prince was consulted upon includes bills on the Olympics, road safety and gambling. No one knows the full extent of these consultations, nor what changes the prince made to the legislation before it went to Parliament. Among the prince's assets are the Duchy of Cornwall, worth £700m, and he received £18m/year in income.