Thanks to everybody for your comments, Hwange is probably the easiest place we have ever been to if you need some good Elephant images, they are quite literally everywhere.
This was taken around 16.30 in winter when the light disappears around 17.30, i was a dull day and the sun was just breaking through a gap in the cloud cover.
Harshad,
I use ISO 800 as standard when there is little light, it gives me extra speed for hand holding:)