Maths at Home - https://www.themathsfactor.com/ - Let Carol Vorderman teach your child Maths during this difficult period. The Maths Factor will be making their service FREE for everyone (usually about £2 per week) to support continued learning at home for the duration of the UK Schools closure period. The resources are matched to the National Curriculum.
Times Tables Rock Stars - https://ttrockstars.com/ - Students can have access to Times Tables Rock stars which improves students’ knowledge on multiplication and division facts. Your child's maths teacher has given your child log in details and should be in their planners.
Prodigy Maths - https://www.prodigygame.com - Is in U.S. grades, but good for UK Primary age.