One of the two places that former Russian spy Alexando Litvinenko visited before he fell very sick and died, apparently from radioactive poisoning, was the Millennium Hotel at Grosvenor Square. 

The Millennium also happens to be the hotel that I stayed at when I was in London two weeks ago.  I was in fact on the premises on 1 November, the day that Litvinenko was apparently poisoned.

Well, I don’t feel sick yet.

See report : "People who visited spy sushi bar urged to contact British authorities" (CNA, 26 November 2006).