I had a look throught some of old Janes and have come across some more info on the Vouga DD class conversions found a nice broadside view of Duo after she had her Squid ASW upgrade it shows quite clearly the layout, there a single 40mm in the fwd TT space 2 single 40mm at the fwd end of the after gundeck and a twin 40mm and director in ther place of Y gun, there is is no sign of the large radar on the bridge in the other photo(undated) that I posted early
I believe that these ships configuration change quite a bit about this period
The pages from Janes are here
http://s719.photobucket.com/albums/ww199/graham003/