Felice - I'm not sure what you mean by 'funded'. All recommended childhood immunisations are free in the UK. They are all also voluntary, and we get very high cover - I heard on the radio recently that it is above 90% now.
Unvaccinated children are not normally excluded in any way, and that is a policy, not a funding issue. During a specific outbreak they may be asked to stay away from school whilst vaccinations are organised - which is within 24 hours usually. I have known one family who home schooled their children during a measles outbreak, but that is very rare.
AIBU to say that husband was irresponsible?
