You'll only find out by filling in the app. form and posting it!
I got 3 A levels (Ancient Hist/History/Bus Studies), two E's and an N.
Got in first time and been here ever since. It's not all about academic qualifications, otherwise the deputy head boy from my school year would have got in (he was a real swot, 3 A's) and I wouldn't. We also had many people on our course who had degrees and found out that they meant nothing in the grand scheme.
Just one thing though, when writing any narrative for the application, do it on a spare sheet of paper and check the spelling before filling the forms. Not taking the p!ss here, but it will create a better impression if you spell properly.