The choice of subject is much more important than the choice of university. Decide on that first, before you look at specific universities and courses. And Education at Cambridge is effectively a joint honours with English, English+Drama, History, Geography, Music, Natural Sciences, Languages, Classics, or Religious Studies. You need to be talented at and enthused by one of these options - you will be studying it for half your time alongside 'full-time' subject specialists, together with your education courses. Challenging, yes, but it is consistently rated the best Education department in the country.