Joined a Front-Office Role (Trade Assistant) at 18 years old with no degree. Should I pursue a degree or jumpstart CFA?

I joined as the only Apprentice in a markets-facing role (trade assistant) at a large financial institution in London. I am completing my Level 4 apprenticeship, studying towards the IMC (2yr course). I will be turning 20 next year and looking to explore further options...

My manager wants to keep me in the team, as a TA / full-time associate - salary range £50-60k. Only when and until the opportunity comes up, will I be trading. However, I am worried that having only the IMC will hinder my employability skills in the long run and I would require to pursue a degree. I'd like to continue to work in trading or PM in an IB or hedge fund in the future - would it be possible without a degree?

I’m weighing two paths:

A) Stay put, push my manager for a Level 6 Financial Services Professional (BSc) at Uni of Exeter, with CFA Level 1 in my 3rd year. Although, keep the apprenticeship salary for another 3 years.
B) Accept the associate role, wait until I've completed 36months (would've finished 21m) and then jumpstart to the CFA Level 1 + futher levels (sponsored). Although, risk having no degree and have the IMC qualifcation, but will be tied down to the bank for another 3-4 years due to sponsorship. 

Pros & cons to both. I am aware that I am in an incredibly rare, "golden-ticket" opportunity and I wouldn't want to risk losing either. I would really appreciate views on degree vs no degree and CFA, as well as insights into the IB and hedge fund culture.