Did Bush Push Blair to Oust Jack Straw Because Straw Opposes Iran Strike?

From CBS News, which echoes what I've been reading in British papers this weekend:

Two London papers have speculated this weekend that complaints by President George W. Bush forced a British minister from his post because of his opposition to the use of nuclear force against Iran.

The Independent suggests that a phone call from the U.S. president to British Prime Minister Tony Blair led to the removal of Foreign Secretary Jack Straw Friday. The newspaper reports that friends of Straw believe Mr. Bush was extremely upset when Straw pronounced any use of nuclear weapons against Iran "nuts."

Both The Independent and the Guardian write that Straw's "fate was sealed" after a White House phone call to Blair.