Same story here lol .. n i was abt to put this question up after my ecas says Decision made. As my husband is in Dubai now..
as soon as we get d decision made and file transfer email or watever .. my husband will be sending a letter which will explain why he moved there(which was fr a job), he will also add his work visa and also a police certificate from dubai(as he was born in dubai lived there for 21 years and went back to pakistan fr 3yrs and now he is back to dubai)
a little complicated but just ask your husband to write a detailed letter with his workvisa or visit visa watsoever it is..
Also i heard that once the file is gone to a visa office and ur spouse moves to another country they do add that to the file but the base visa office remains same.. (but as i said i jus heard dat from non authentic source so this can be false aswell) ... hope this might help a bit..
n if you get to know anything related to this situation hit me baq aswelll