Suffolk Parent Carer Network have produced an Information Pack for Families relating to Covid-19. It can be found here: https://spcn.org.uk/parent-carer-support/
There is a large list of resources and links in the information pack that might be useful for talking to children about Covid-19, including support for SEN. There are also ideas and links for activities for children at home. Please do share to anyone you think may find it helpful.