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What would have happened if the Japanese minimum demand of 5:5:3 in terms of battleship tonnage had not been met, or a different Japanese negotiating team had walked out while holding to a 5:5:3.5 ratio?

I'm not asking about what Japan would have done: I am well aware the IJN would've pressed for as many ships as it could have, wrecking the Japanese economy in the progress (the Tokyo earthquake would certainly not have helped). What I'm really interested in is whether there was the political will in the isolationist, and disarmament-leaning Americans and British to build up past the battleships already under construction, such as the South Dakota, Lexington, Hood, G3, and N3 classes, especially in Britain.

Would Britain have further sacrificed its strained economy just to keep up in capital ship numbers with a US that insisted on completing all battleships and (perhaps) even starting new ones for the sake of national pride? I know that the Treaty will probably end up being signed in 1924 or 1925 rather than 1922 (as Japan will be economically crippled), but I am more interested in the economic, strategic, and political effects in Britain of either trying to keep up with the Americans or admitting that the RN is no longer the world's #1 navy.
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