Hi, I'm Portuguese.I live in UK. Now I want some questions as follows.
A. Where can I renew my passport? What is the address of your office in London?
B. Are there any application form for renew? Where can I get it ?
C. Can I research the related information and schedule on net?

We don't have a London Office... and we don't renew Portuguese passports... However the Portuguese Embassy does... and they will have the rest of the information.

Try Google... its Amazing what info you can find on things.