Thanks for your qusetion.
I'm afraid that there is no provision which allows for a visa to be fast tracked in the way you have suggested. Applicants applying outside of the UK must book an appointment at the British Embassy in order to personally attend submit their documentation and carry out the required biometric tests.
The application will then be processed. All out of country applications in SA are, I believe, processed there. They are not sent to the UK for processing. The processing time quoted is 6-8 weeks but unforunately this is very much dependent upon how busy the processing department. If they are overburdened then it can be quite a bit longer.
I can only asssume that there was a misunderstanding and the person your wife spoke to was suggesting that internally it only takes them a week to go through a very well prepared and organised document in order to approve the applicant in principle. There will be some time before it reaches them where it is lodged on their records and some time after where the adminstration of actually arranging for the stamp in the passport.
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I thought that was tha case, thankyou for your time
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