From that I'd say the NHS, the armed forces, our culture and arts (particularly our literary output over the centuries), and there are still many British businesses that pack a punch. I don't think we have a complete democracy so I would never answer that.
Nonetheless, I agree with others that being proud of where you're from is somewhat strange and cocksure. It's something you have no control over. Any achievements an individual may make in life, or any their children make make; well that's something you can certainly be proud of.