Twelve new Babcock & Wilcox (UK) superheated boilers were added in 1910 (for a total of sixty), and the remaining eight original boilers were replaced by larger Babcock & Wilcox units in 1912/13.
Twelve new Babcock & Wilcox (UK) superheated boilers were added in 1910; again placed on top of the original boilers. The remaining eight fire-tube boilers were replaced by larger Babcock & Wilcox units in 1912/13.