I'd say your looking at 97+
Its up to Standard English to decide whether you hit a 99 or not. How good do you see you're rank 1 in english, like do you see yourself getting a band 6? or is it because there isn't too much competition? Nevertheless, If you can manage a band 6 (only a few every year) you're looking at 99+ , if you get around 80-85 I'd say you're sure to get 98. Just remember keep up the hard work for your other subjects
Good luck, what are you aiming for? .95?