You will have to tell the registrar:
When someone dies, you must get in touch with certain organisations to let them know as soon as possible.
(TIP: You may be able to use the “Tell Us Once” service to do some of this if it is available in your area)
The government departments that can be contacted in one go include:
If your local authority does not offer the “Tell Us Once” service, you will need to contact these departments yourself.
You will need to return their driver’s licence to the DVLA and passport to HM Passport Office.
You may need to contact other organisations as well:
If you do not qualify for a Funeral Payment – or it does not cover the full costs of the funeral, you may be able to get a Budgeting Loan from the Social Fund. These are interest-free loans of between £100 and £1500 that you repay from your benefits.