What if the Royal Navy Lion-Class Battleships of World War II were not cancelled and were made?
I had to do a bit of research before I answered your question, so I’m sorry if my answer doesn’t do it for you but at least I tried. It appears that not only was the project costly, but with the outbreak of WWII, it became an impossibility to make them. Perhaps if they had been completed before the outbreak of war, it appears they would have been rather useful, but given the circumstances and the time line, it seems as though they would have been more of a drain and rather useless, as the Brits concluded that they would not even be finished by the time WWII was over.