From the AN Guidance:
https://www.gov.uk/government/publicati ... accessible
Quote extract:
"2.1 Check you meet and understand the requirements before you submit your application. You must:
Have lived in the UK lawfully for the required time period (5 years, or 3 years if the spouse or civil partner of a British citizen), without excess absences. You can meet the lawful residence requirement if you have indefinite leave in the UK."
Have been in the UK on the first day of the qualifying period. This will be either 5 or 3 years before the date on which you apply."
Just give the address history as is - if you apply as spouse of BC.