Your link says John Major instituted a fixed exchange rate regime and made pounds overpriced. Soros didn't even break the news (a German official did), he just made the most profit shorting the pound. I wouldn't call it "breaking the pound" unless you think the pound was priced about right and he made his profit manipulating the public opinion and thus moving the market.

BTW, I found the interview rather trite; he's really full of it.