Looking at the conversions since the paper was sat (not including 2016 as this was only 60 minutes each paper rather than 75), to get 6.5 you needed 24/40 in 2017, 2018, 2019 and 2020.
Would it be reasonable to assume this mark shouldn't increase by a substantial amount (e.g. more than a couple of marks) in 2021? Also this year it'll be a computer-based test, would that have any difference to the average score?
Paper 1 is alright, just the new content on paper 2 not exactly similar to the A Level syllabus like if statements, necessary, sufficient etc all those terms is a little difficult, but the notes on the website help.