From the (not at all anti-American) Daily Telegraph :
All 12,000 American airmen based in Britain have been banned from going near London because of the bombings.
The directive, issued on Friday, indefinitely bans USAF personnel, most of them based at the huge airfields at Lakenheath and Mildenhall in Suffolk, from going inside the M25.
Families of the servicemen and women are being “highly encouraged” to stay away, too.
While Ken Livingstone, the mayor of London, was boarding an Underground train yesterday and declaring that “we don’t let a small group of terrorists change the way we live”, a USAF spokesman said the ban was “a prudent measure”. Its aim was to ensure “the security and safety of our airmen, civilians, their families and our resources”.
Westminster city council accused the Americans of playing into the terrorists’ hands.
UPDATE: The ban has now been lifted .