on september 2011 me and my husband got married but we have been living together from december 2009 and has one daughter. i send my application on october 5 2011. without our marriage certificate but i include letters with same address on it, the copy of our cohabitation agreement signed in front of our lawyer last february as a common law partner. is it gonna be a problem or delays in my papers. do i need to change my lastname in my passport in to my married name? is there any documents i need to submitt? please help me. Thanks