Sure Start Maternity Grant

You could get a one-off payment of £500 to help towards the costs of having a child. This is known as a Sure Start Maternity Grant. 

You usually qualify for the grant if both of the following apply:

•  You're expecting your first child, or you're expecting a multiple birth (such as twins) and have children already
• You or your partner already get certain benefits

You must claim the grant within 11 weeks of the baby's due date or within 6 months after the baby's birth. 

You do not have to pay the grant back and it will not affect your other benefits or tax credits.

https://www.gov.uk/sure-start-maternity-grant