Looking for a decent 50/50 DSLR bag?

Right, I'm looking for a backpack that can carry my Nikon D5100 and attached 18-105mm lens, my flashgun and my packed lunch. I believe they call them 50/50 bags.

I've looked but I don't seem to be getting anywhere. My budget is between £50 and £75.

Look for low-pro and tamrak on the web they both make them I have had both and the low-pro is possibly the better apart from the strange access door to get camera out and i had to modify it with Velcro