The logistical case for a British 15-inch/45 gun

Would the Nelson class have been better armed with 15-inch guns for logistical commonality?

The logistical argument favors 15-inch/45 guns, but Britain chose 16 inches because rival navies had moved to that caliber.

A 15-inch/45 weapon could have extended an established British caliber while improving performance and easing fleet logistics. Gun choice was constrained by international competition: once other powers fielded 16-inch weapons, accepting a smaller headline caliber became difficult. The proposed 15-inch/45 appears compatible with Queen Elizabeth-class modernization as well as King George V design work.