I have a combo box in cell A1 with its destination cell set as B1; I can
auto-copy the combo box using the normal drag & drop autofill to get new
combo boxes all the way down column A, but the destination cell for all the
new combo boxes is still set as B1.

Is there any way I can get it to automatically increase the row number of
the destination cell for each new combo box (I have about 2000 rows to do so
don't really want to have to go into each one to manually set the destination
cell!)

Any help very much appreciated!