The loss of a significant insider in whasshisface what gets shot by Bond.
Quoting onesself - the act of a stinker. However, it's a nice day and I'm out in the garden watching deadlines fly by, so...
On this one, something nags at me. If Mr White had not been captured, presumably The Traitor Bloke would have continued to bodyguard M. Nothing to suggest he was going to try to kill her that day or make his move.
Accordingly, his actions must be either a ) an attempt to rescue Mr White or b ) (more dramatically pleasing, albeit no chase) an attempt to kill Mr White then kill himself (be it gun to the head or "suicide by Bond").
If a ) this is a bit of a flawed plan, as plans go, because he'd have to pretty much kill everyone and there are more of them than him. Also, he runs off. As a rescue attempt it seems a bit ill-thought-through.
Additionally, if a ), then it does rely on Mr White being in a fit state to be rescued (and how he gets out and no-one spots a limping man with a shot knee wandering around Siena is a bit... um...).
Ah well, perhaps it was time for a chase. There'd been about three seconds of dialogue.
I do rather like b ) as an idea though. Is The Traitor Bloke trying to kill Mr White?