Blocked

Here you can see the problem more clearly. We're looking from inside the firebox at the arch that leads through into the ware chamber of the kiln;the vertical prop you can see in the top half of the picture is supporting the arch,and behind is supposed to be a 17 cm gap for flame to get into the kiln; here you can see that there's a row of brick sealing off the arch instead- blocking heat from reaching the kiln. Not smart.