The 'Revision' links provide really good question/answer based work for every individual learning objective in core subjects for Years 4 & 5. Sadly, being so useful, the website only allows a certain level of access. However, for a Family Membership of £12.99 per month, you can have access to both English and Maths resources from Reception to Year 13! This is refundable, if after 30 days you are not happy with the product. This decision would be up to individual families, but a good longer term investment.
Audible - lots of free audiobooks!
While schools are closed, this service is completely free for children to listen to a wide range of stories - try them in a different language too!