from my understanding, ACN's standing/perception in South Africa is relatively higher than in the UK. South Africa is also not perceived as being as advanced as the UK. You may find this tougher than you think..... "Oh, great, yet another ex ACN guy who has been unemployed (oooops, I mean freelance) for the past year". Ooooh woopie someone who is leaving South Africa and wants to work in the UK.
Please do not take this the wrong way... I am sure you are brilliant and I do know that there are some very talented people in ACN in South Africa. You may find that you have to fight a bit harder than you think to get a good level job though. That said, the market is quite strong relatively speaking. You certainly need to drop the "how great I am" piece. From your intro, you sound credible but far from unique as far as a hiring company is concerned.