Sapphire1974 wrote:Its no required; just send those documents which they have asked for..... don't try to be unnecessarily smart..
It is not part of your application that you need to submitt the work permit letter however caseworker needs to establish your immigration status from your application. Burden of proof is upon you. Not on them however using few clicks they can also justify this from their database.
Submitt the photcopy if you have one.
if you do not even have a photocpy then try to get a copy of letter from UKBA. Alternatively you could request your SAB report, that may contain the copy of your work permit (however SAB process could take 1-3 months).
If you can not do any of the above and do not want to wait for whatever reason then it is better to apply without work permit letter. You will see the result soon.