Fifty years ago, Colonel Nasser nationalised the Suez Canal. The UK and France, which previously owned it, persuaded the Israelis to invade Egypt and the resulting furore helped permanently damage the reputation of the then British Prime Minister, Sir Anthony Eden, and showed the UK that when push came to shove, it would be playing second fiddle to the US.
Eden had previously a high reputation, just deserved. Admired by politicians across the spectrum, he resigned as Foreign Secretary over Chamberlain's appeasment policy, played second fiddle to Churchill faultlessly in public, and had a debonair charm which effortlessly cut ice.
Unfortunatley by the time he became Prime Minister, he was past his peak, was a sick man, and that in turn may well have affected his political judgement at a crucial moment in his premiership.
I am not using this as an analogy with contemporary politics save this. With regards to Lebanon, no side is wholly blameless, but Israel must try and aim it's attacks soley at Hezbollah (although how much we really know and how much is reporting bias is open to conjecture) and the UK must pause for thought here, take a moderate stance, and take a deep breath before plunging on.
In some respects the present Prime Minister has done well with regards to a political legacy. Presiding over a strong economy, if allowing for serious mistakes like Iraq. But if he really wants to leave with a good legacy, he should perhaps be a bit less servile to the US and try to take more of a tough but moderate stance. Because now is the time to pause and reflect if we are able to be in a position to be of real help in this present conflict.