What motivated British Prime Minister Anthony Eden to launch a military operation to regain control of the Suez Canal in 1956?

focus on the Suez Crisis of 1956. try and understand British actions and motives through a range of primary sources that reveal the inner thoughts of the British Administration of Prime Minister Anthony Eden.

What motivated British Prime Minister Anthony Eden to launch a military operation to regain control of the Suez Canal in 1956?
Why did the United States support negotiating with President Nasser of Egypt over the future of the Suez Canal instead of military action by Britain?
Addressing the House of Commons in December 1956, Prime Minister Anthony Eden stated: “that there was not foreknowledge that Israel would attack Egypt.” Based on your reading of the sources was this statement true?
To what extent, do you agree with Magaret Thatcher’s analysis that Britain’s mistake during the “Suez affair” was not acting “quickly and decisively” enough?