Enquiries in Big4 offer for MSc students with experiences

#1

Wish you guys a really good day.
I will be studying my Master in Banking and Finance this September 2019 at University of Nottingham. I have already hold a Bachelor Degree in Banking and Finance with Merrit. Also, I have 1.5-year working experience at PwC Asia at Audit and Assurance function, with very outstanding performance. In addition, I have completed 9 F papers in ACCA recently.
I am seeking for a job opportunity at Big4 with Tier 2 sponsor after completing my Master course. Is it, by any chance, possible for a postgraduate non-EU student like me to get a job at Big4 UK? When the vacancies open and when should I prepare and apply for the job if I want to have a job at Big4 in 2020?
Please share your experience since I am looking for you guys to give me expert advise.
Thank you very much.