I assume they all work together as a team. When they needed supply, they dropped the dollar, gold went over $1900, and IN IN IN comes supply from Americans, people turning it in to the smelters and on to where they needed it.
Wash rinse repeat, run the Pound down, Gold goes higher in UK, and IN IN IN comes supply from the British people turning it in to the smelters and on to where they needed it.
One year, US gold up only 10%, UK gold up a nice 34%.
http://www.kitco.com/gold_currency/index.html?currency=gbp&timePeriod=1y&flag=gold&otherChart=no