Numicon https://global.oup.com/education/content/primary/series/numicon/impact/?region=uk
Catch-up Numeracy https://www.catchup.org/interventions/numeracy.php
Rtl https://www.dreambox.com/math-intervention
NCETM https://www.ncetm.org.uk/resources/teaching-resources
… also do ask Zena Martin Inclusive North