A great little story from AboutMayfair.co.uk:
"Former Prime Minister Tony Blair is setting up his new base in rented office space in Grosvenor Square, Mayfair. It will be home to his work as Middle East Envoy for the Quartet, according to a report in Property Week.
Mr Blair has taken a ten year lease on 9 Grosvenor Square, which was once home to the 2nd US President, John Adams (between 1785 and 1788)
Throughout his time in office, Blair was accused of being too close to the US administration so it is perhaps ironic that his new office is in Grosvenor Square- famed for its links to to the US - and just over the road from the US Embassy."
Mr Blair's move coincides with recent news that the Americans are considering moving their London presence to a new, more secure location.