I think Blair is a bit of a maverick regarding foreign policy, a bit like Thatcher was.
By this I mean he probably often departs from the conventional Foreign Office line.
Note how low-key his Foreign Secretaries have been.
His keenness for intervention has led to Blair being called 'Lord Palmerston' by the civil service at defence and foreign affairs, after the 19th century exponent of 'gunboat diplomacy'.
This became apparent in Kosovo in 1999, face it, he was the only NATO leader who was really happy with the operation.
When the political restrictions were badly hampering the air campaign, plus Clinton and other NATO leaders vetoing the possibility of using ground troops, Blair asked the Ministry Of Defence to prepare plans for a ground attack.
Hopefully this would embarrass the rest of NATO into joining in, if it became necessary.
But if not, the planning had to take account of that, if that meant putting more than half of the British Army into the field, (and virtually all of it's heavy armour), so be it.
I've friends at the MoD who say that the planning was deadly serious.
Some in the US media, and probably a few on Capitol Hill too, sneered that Blair wanted glory paid for with American soldiers lives, how wrong they were!
But then the Serbs broke, and gave up the fight.
God knows what Gordon Brown makes of all this, it's reported that he has been lukewarm towards the extent of support for the US since