I realized after the shot had been taken, and things were put by that i could have at least defused the shot.
But at the time the dark clouds were closing in so fast i was loosing light, so much so the camera would not even focus, so i had to make a snap decision and use the inboard flash.
It may have been better if i had turned the power down to 1/16 the same time as defusing, but i am going to be looking out for a similar situation, and use the tripod, now its funny as i would have normally used a tripod for this type of shot, but then you live and learn!.
A big thanks for your input to the thread.
Best regards Paul