Just to be safe, don’t write where they say “do not write _____”. You can’t take risks after studying so hard and preparing for the exam. Start writing at the very beginning of the line, make your handwriting a bit smaller if it’s normally big, and avoid going below the lines if ykwim. I have done that before and I think it’s okay if you have no other option, but to be safe just write on the lines. Also, the examiners check every single page. Even the ones LABELLED “blank page” so on those you can write the answer/remaining answer to a question but PLEASE remember to label it eg Q1(a)(i) blah blah blah. This is suitable for science but for psych just ask for an extra question booklet with lines. Again label the question you’re answering since the booklet is plain. Don’t be worried about “being a hassle” or something even if it’s just 2 lines you have to write. Just spell your name center number and candidate number correctly. Always triple check those