I'd always wanted to be a spy when I was little and I would spend summers crafting code wheels and solving pretty unmysterious mysteries. So when I heard I could stay at a former MI6 headquarters in the heart of London, I jumped at the chance. The Royal Horseguards Hotel - located right next to the Embankment tube stop - is set within a grand government-style building on the banks of the River Thames. On walking into the place you're certainly made to feel like a special agent with a doorman in a top hat greeting you and a giant glistening chandelier hanging in the lobby. It was a Tuesday ...