change to be an analyst

2 years' working experience on CPA firm
BSc in App. Acc (Oxford Brooks) obtained
CFA Level one passed

Is it enough to apply for junior analyst/analyst trainee in investment bank ?
Is an academic qualification in finance needed additionally? If I want, (undergraduate or master) which one is preferrable for me and will be considered by those investment bank as a good-background beginner in financisl field.
Thank you very much !