There seems to be an issue with the British ships.
Dreadnought IV 23,600t - 32,500t
Dreadnought V 22,700t - 31,500t using the von_der_tan_hull_b_long2 hull
Dreadnought VI 25,500t - 35,500t
Dreadnought VI 33,000t - 45,000t
It seems that there has been a mix up with the hulls.