Firstly, in my opinion you should apply if you want to. Secondly, GCSE's are only one aspect of what they'll be looking at, so things like you're admissons test, predicted grades, personal statement are all accessed. Thirdly, if you apply and don't get in but your A Level exam results went really well - I would also suggestbeing open to reapplying. As if you apply already having the grades, it puts you in a strong position when applying. Hope this helps :))