Hey. I'm from the UK too. You can apply at any college you want to to do A levels. Usually they want 5 GCSE's at grade C and above, but if you don't have that, they may want an interview.
I don't think a university would take you on right now with only GCSE's sorry. Although there are some science foundation courses you can do at a university that might be possible, which I don't know anything about. Have a look on
www.ucas.ac.uk. Brilliant website, shows all the courses availiable at every university. You can also apply through this website.
I am going to university in September/October to study Forensics at Lincoln. I applied to 6 universitys, I got offers ranging from 220 points (e.g. CCD) to 300 points (e.g. BBB). Lincoln wants 240 points from me. So that's an incling into what grades they want.
Also most universities want Chemistry at A2 level, Biology at at least AS level, and Maths and English at grade C and above at GCSE.
There is another option though, which you could do straight from GCSEs which is going to do a course, I don't know much about it, but it is a 6 week (approx) course where you qualify to become a SOCO.
So it depends what you want to do in forensics. I think that's all I know, someone will probably come in in it a bit and correct me, lol. :lol:
I hope I helped.