my last exam is on the 22nd june, and it says the latest date you have to be available from is the 26th. So it should be okay.
Im 18 in march, and yeah hopefully there will be nothing on my record I don't really know though... and they seem to make a bit of a deal over the police check thing, although i guess its more to check that you're not a paedophile or something than getting in fights when you're a kid...