Your A Level options sound fantastic, especially for what you want to do! French is a fantastic subject and I'm about to start my A2 course and I can't wait to learn even more. Similarly, English Literature is a really interesting subject. If you ever need any help or advice with either subject, feel free to let me know.
I didn't study Business or Mathematics, but they definitely seem relevant to what you're doing and most people that I've talked to seem to enjoy studying them.
I don't know if you'd need to do Year 14 with retakes and new subjects. It is of course up to you, but as long as you work hard in Year 12 and Year 13, you should be able to get into a great university without retaking.