South African student in need of career guidance

Hello everyone, just looking for a bit of help in terms of career guidance. Here is some info about me.
So as you can see from the title of the thread I am a South African student.
I attend one of the more reputable universities in the country with regards to finance and love finance.
I'm majoring in Investments and portfolio management and am going along quite well with decent grades and I plan on completing my CFA in the near future.

I've completed an internship with the countries biggest bank, unfortunately this is not a BB. I'm currently doing a program with one of the MBB(consulting) while I study and I think I have a really good chance of getting an offer there(hint, its the one that does lots of consulting in private equity.) So I graduate in two years and my question is this, my goal is to one day end up in London in a finance job, as it is my passion, but my concern is that I won't get recruited at a GS/JP. What is my best way of going about this? Should I try get the offer at the MBB, and get an MBA, get a transfer to London and then try move across to finance (IB or PE). As you may not know getting in the BB in South Africa is almost unheard of for a white male(affirmative action). My other option would be getting in with a local bank. Obviously this way I would not be able to get a top class MBA, and my chances of moving to London in a top job may be limited, so I'm interested to see all your opinions and thanks for the help.