[JayP]

Managed to post a cross section and perspective of the oven and James said he would reduce the size of the Moroccan oven pic for me as it was a bit big.

Thanks for the feedback guys, no worries to bring the entrance it down to %63 (thanks Dutchoven). Yes the flue is at the back, I have seen this in pictures of commercial ovens. A factor I considered in the placement of the flue was that it was not above the height of the top of the door and that a damper can be fitted if the flue sucks to much (the flue is 2.5 to 3m). The oven will also have a wooden door that will control the amount air coming in.

Cheers