Hi there
There is so much you can do in your gap year. With a level 3 in childcare, you gain so much work experience there is no reason why you can't find work in a nursery or in a school as a teaching assistant. In fact, i know people who have been offered a job from one of their placements whilst doing their level 3.
Alternatively, you can find a job in retail that centres around children e.g. Build A Bear, The Entertainer etc. One of my friends is a supervisor at Build A Bear and she's also going into primary teaching too. It shows you can work well in various environments, and most importantly you can work well with children outside the classroom too.
As for university, it depends on how far you're willing to move and if there is anything specific you're looking for. Universities that are known/good for primary education include Edge Hill, Brighton, Worcester.
Hope this helps!