You should register the death of your loved one within 5 days in the person died in England, Wales or Northern Ireland (8 days in Scotland) at your local Registrar of Births Marriages and Deaths.
REGISTRATION OF DEATH
England & Wales
Registration takes about 30 minutes and it is recommended that you book an appointment.
In most cases it should be a relative that registers the death, however there are circumstances others can do this, please consult with the registrar when you make your appointment.
You will need to take the medical certificate that shows the cause of death, it is also useful to have the birth certificate, NHS medical card, passport, marriage or civil partnership certificate, driving license and a proof of address (utility bill) if you have these to hand.