Well I decided to have a look at what is required to visit the UK, I have gone through applications to go elsewhere but obviously not to enter the UK.
This did surprise me but obviously good. Argentinian citizens are among the ones who do not require a visa to enter the UK for tourism or business purposes
This surprised me for Uganda, never occurred to me it would be even possible.
To get a decision by the end of the next working day
If you’re eligible you can choose the ‘super priority service’ when you apply. You’ll need to pay £800 in addition to the application fee.
You’ll get a decision:
by the end of the next working day after your appointment, if your appointment is on a weekday
2 working days after your appointment, if your appointment is at the weekend or on a bank holiday
What I could not find out is how quickly you could get an appointment. Now of course all this assumes you qualify for a visa, I do not know his circumstances.