You may want to have a look at a concept called 'Let's visit Numberland', aiming at children as of 4 years of age. It's an approach from Germany which has been in place for ten years now and there are several projects also running in the UK (I could set up some contacts with schools for you).
It is one big story on numbers with individual stories for each number (1 to 10): Together with the children, we visit an imaginary land where the numbers live... We explore how their houses and gardens look like and what items we can place there while talking to the numbers and discussing among each other, singing, playing active games, relating daily routines to it. It is an open concept but offers a structuring and emotional frame. More info and the research done on it under www.numberland.net or contact me at email@example.com