In this web you can search with immigration summary form, and you will find planty of post saying, this can because of security and background chack , people who have lot of travelling history. But no one is clear why only few people requested such form. Some time they ask to fill only main applicant or spouse or both, in my case LVO ask for both, it seems from the post it will delay application time. But no one is clear about the form. In my email LVO clearly mention write all UK address with post code. But in form it say last 10year addresses, why they are more focus on uk address don't know. I will post this form here later today.
Hope everything is ok in my case.
Lostworld
