It's 2.65% up to a maximum of 4,770€ per year, so if you make a lot on dividends you'll never pay more than that (that's equivalent to 180K on dividends per year, anything above that you don't pay anything extra).
And nothing else.... As long as you stay there for 60 days per year as a non-dom.
And nothing else.... As long as you stay there for 60 days per year as a non-dom.