You can check if your child can receive free school meals at their school in England via the government website. If your child qualifies you may also be eligible for the Government’s Holiday Activity and Food Programme. If your circumstances have changed do take a look at the website or speak to your child’s school. https://www.gov.uk/apply-free-school-meals
Your child, if they are in Reception Year 1 or Year 2 they will receive Universal Infant Free School Meals already. However if your child is in one of these year groups and you apply for free school meals this will allow your child’s school to receive additional funding.
As someone who received free school meals as a child I urge you to apply.