thatcher outed after falklands war loss who becomes PM

I'm thinking of a TL in which a split in the conservative party happens due to a falklands war loss, the split being roughly along wet and dry lines. For reference the idea I had is that Argentina accepts the initial U.S peace offer. This then isolates Britain and Argentina gets more material aid due to Thatcher pressing on regardless, at some point Maggie gets a no confidence vote and resigns. At this point who was the most important "wet" in the conservative party and what was the rough proportion of wets to drys in the Conservative party at the time?
 
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