oh wow congratulations! i had hoped it was wrong as i am wanting to take law , is it an interesting a level topic?
You don't need to do Law for Criminology and as several people have pointed out, its actually a fairly dull subject with heaps of reading and essays. If you can do Sociology or even Politics instead you might find it more interesting and more relevant to Criminology.
To find out what Criminology is all about (ie. is it what you think it is, would you enjoy it?) then its worth looking at some University coueses now and even going to a relevant Uni Open Day in and listening their presentaions about the course - there will be lots coming up between now and June, and you don't have to be 'about to apply' to go.
The only top university that is slightly averse to A-level law is LSE, if I'm honest.