The grid for this puzzle has some mistakes in it (is this a clever way to defeat the credit crunch by printing prize crosswords which cannot be answered??)
for 12a read 11a
there is no 11d and 12d, for which there is no clue, does not have the correct number of spaces. I think that the answer to 11d should be "Aral Sea" and if you put "ral sea" in 12 d you can complete the grid.