Great drawing Raxar, I've only just found this thread!
If I may, I have a couple of recommendations to get this drawing totally perfect:
-Shading on the 12" guns: top, fore and aft surfaces.
-Shading and deail on the 9.2" guns: the vertical line on the side-view guns should be dark grey instead of black.
-Shading on the masts to show they are circular.
-Shading on the fore of the main superstructure to show its angle.
-Black lines on the hull should be dark grey, and shading could be applied to the armour belt.
-Highlighting on the prop details and bilge keel: lighter red colour for upward-facing surfaces.
-Consider improving or re-drawing the net booms and their rigging (feel free to copy/pinch some bits from one of my drawings:
HMS Dreadnought
-Changing the flags, these look a little 'boxy'.
-Changing the outline of the crane booms so they are evenly spaced.
-Moving the (I forget what these are called!) to eliminate double black lines: