I'm currently doing a Human Biology course at local school round here. It's a 30 week (4hrs per week) course with written assignments etc. Its a HEFC course which is organised by Northumbria Uni. Check with your local uni and see if they have any similar schemes going.
I've got the final exam tomorrow!
I paid £150.00 for the full course and yes its equivalent to an A-Level.
Do a foundation year at uni?