Please reply my girlfriend was also deported from UAE and we don't know if we should declare it on our UK visa application.

Brooksie, I have used your post from an older thread (piggy-backed) to create a thread for you to get answers appropriate to your needs. You can add information or more questions by relying to this thread.

Thank you.

You have to declare a deportation from Europe. They will find out anyway from your passports.

You must disclose all information regarding deportation and other criminal records, if there is any. Do not lie ever! If this issue is found out later, your visa will be permanently revoked.