Hello everyone!
Come on people, that's not really a hard question, is it? What on earth could possibly be disastrous about the Iron Dukes or the Kongos??
The dreadnought in question is... well... NOT a dreadnought, with a mixed caliber armament and 1890s vintage center pivot turrets! And the real disastrous thing about it: They ordered six of them as late as 1906, blocking all yards capable of building dreadnoughts in the whole country for four years.
Enough hints?
Greetings
GD