Hello Iain,
Thank you for the links - I had already read the information you suggested and completed the AYR quiz but I appreciate it nonetheless.
I'm thinking more along the lines of additional studies - books, courses, useful websites to find out more before I begin the course to give myself the best start possible and maximise the free time I have right now.
As an update: I have now got about 110 hours of free courses on Open Learn lined up (including all the maths ones), I am going to start using Khan Academy and I have been looking at the Introduction to Science MITx course but it's 12 weeks and I'm not sure I'm quite there yet as I think that will drop me right in at the deep end, although maybe that would be a good thing?
For books, I heard about Molecular Biology of the Cell which I think is too advanced and too specific for anything I need right now and I'm also looking into a good essay writing book.
It just dawned on me that there is so much information out there but I can't see the wood for the trees so I'm looking for suggestions as to which areas would be the best use of my time and most applicable to the course I'm taking.