HMS Leviathan (BC-1908)
What sort of ship could the British have built if they were to build their battlecruisers with more armour and lesser armament. Vickers had designed and built a 10" gun with twin turrets for both Russia and Japan (Rurik and Satsuma types). Utilising this weapon loses a bit in explosive power (12" 850lb, 10" 520lb) but gains in the range of the guns with the twin turret being made so the guns can elevate to 30 degrees to give a range of over 26,000 yards. The same motive power as the Invincible could be fitted which means the ship(s) could still do 25-26 knots. The biggest change is in the armour where the original 6" belt is replaced with an 8" belt which would give cover against the German 8.2" and would also be thick enough to withstand hits from the German 11" shells.
8 x 10" (4x2)
10 x 4" (10x1)