Ok. So I was talking to my teacher who marks Business and it turns out that the BOS are trialing a new computer based marking method, where the papers are scanned and saved at a 'really high quality' to make the whole process a whole lot quicker and more efficient.
I specifically asked her if we are screwed if we have written outside the box (including on the blank pages on the left of every booklet), and she said that they are scanned and they do see them, but it can cause hassle. She went on and said something about if there is even a minor mark on a page then it will scan it and add it to the electronic copy of your exam, but it she recommended to try and write inside the borders, or if you have a plan that you want marked that is on one of the blank pages, make sure you write "PTO" in the ruled section (or something like that)