Hi, I just wanted to share my experience with you. I passed my grade 5 (I was 17 yrs old). 6 Years later, I decided to start my music education again with the goal of getting my diploma. I then took my grade 6 & 7 at the same time which saved me 1 year At first my teacher thought I was crazy for wanting to do grade 6 & 7 together, but after a few lessons of hearing me play, she said it should be no problem. Come to think of it, it was easy, there isn't much difference in difficulty between the 2 grades! I don't think ABRSM will allow u to take grade 8 if you have finished grade 5 (without 6 & 7). Sorry, but I may be wrong. Good luck in your choice, and I think that you are still young and should enjoy your musical journey. When I look back, I didn't enjoy it much, it was like a rush-rush. Sigh, I hate exams sometimes.
Which ABRSM theory grades have you passed? You need to have passed a certain level in theory to be able to take grade 8 practical
Well there is a large jump from grade 5 to grade 8. If you didn't get distinction in grade 5, I wouldn't consider attempting grade 8 until you have sorted out the things that caused you to lose marks in grade 5. Grades aren't just about pieces, you know that Also, grades 6-8 require "musicality" as well as being able to just play the notes. No doubt you can play the notes in the pieces you listed in your first post, but can you play them as they are meant to be played? its doubtful at best.Prepare yourself properly before attempting the advanced grades to avoid disappointing results. If you do decide to take the exam, then good luck