Oh okay - well I'm not sure if you know, but the Access courses have really changed this year, but have a look at the course content, so get as many credits in science based subjects as possible. My friends course was Access to Science, under which he had certain subjects he could choose from such as bio, chem, maths, etc... Your local Access provider should be more helpful, or have a look at DIstant Learning Centre which may be more tailored...
Hope that helps.