Currently a British Pound Note is worth $1.65 American as of 06/22/12. So 10 million British Pounds is worth 16.5 Million American. The currency markets always fluctuate. (If you have that much of a fortune go enjoy life with the benefit of such wealth and power).
1 billion $
How much is 5.5 Million pounds in US dollars?
Just go to a conversion website or fin out how much 1 pound is