Thanks guy's,
I had somehow missed the Lowpro ones with dual sections. And it's interesting that the Nature Trekker has the extra pock, hard to see that from their site/description.
That Lowepro Rover AW Plus sure looks like a good alternative.
They have a new Primus AW which looks interesting too, but a bit iffy.
More suggestions welcome. More brands etc.
Thanks,
Roger.