From Wiki,
The Lion class (HMS Lion, HMS Tiger and HMS Lynx) were a class of battlecruisers built for the British Royal Navy before World War I. Nicknamed the "Splendid Cats",[1] the ships were a significant improvement over their predecessors of the Indefatigable class in terms of speed, armament and armour. The Lion-class battlecruisers were 2 knots (3.7 km/h; 2.3 mph) faster, exchanged the 12-inch (305 mm) guns of the older ships for 13.5-inch (343 mm) guns in new triple turrets, she was the first ship in service with them (Dante Alighieri was started earlier but not finished first) designed to shorten the length of the magazines, and had a waterline armour belt 12(mags)-8(ER/BRs) inches thick versus the 6 inches of the Indefatigables. These improvements were in response to the German Moltke class, the first German battlecruisers, which were larger and more powerful than the first British battlecruisers of the Invincible class.
9 x 13.5" guns (3x3) rest as OTL
AM I weird for liking HMS Nelson ? Not that this look very nice but would be better than OTL ships.