What information will the registrar need?

date and place of death
name of the person who has died
maiden name of the woman, if she has been married
date and place of birth
occupations of the person (and if she was a married woman, the full name and occupation of her husband)
usual address
whether the person was getting a pension from public funds
if the person was married, the registrar will ask for the date of birth of the spouse
if available, the National Health Service number or the card itself