The US embassy looking rather spectacular in today's September sunshine. London's first new moated building since the medieval era, it opened at the end of 2017 after the previous embassy in Grosvenor Square was deemed to small and no longer fit for purpose; not least as US Congress ruled that all embassies must be set back from the street behind a 100-foot 'seclusion zone,' and be built within a self-contained site of at least four and a half acres. The building cost £1 bill