By a quirk of fate Progress Flight Academy is where I did my PPL in 1996. In those days it was a lot cheaper in South Africa. Not so now.
Progress have tried to make their syllabus as attractive to Europeans as possible, and their programme of PPL/multi/night, total 155hrs gives you the max benefit back in the UK - you can then go straight into the JAA CPL course. SA's a great place to fly and the best SA instructors are among the best in the world. But the attempts to set up JAA-approved training in SA have left a trail of wreckage over the last few years and there is still no JAA training in SA.
If your ultimate intention is to get a commercial job in the UK there's no point in doing a South African CPL, ATPL or FI, and not much point in doing an IR. This is because they are basically not convertible. You will have to do the full 650 hour JAA ATPL theory course and pass all the exams even though you have already passed the South African ones. To convert the IR you will have to do at least an additional 15 hours dual instruction and pass the IR skill test. That alone will set you back over £5k. You will also need a JAA Class 1 medical and a UK Flight RT Licence.
You'll hear a lot of racist crap talked by white South Africans about how hard done by they are. Admittedly the ones who are now having to compete in the jobs market might argue with some justification that they can't be held responsible for apartheid, but the old regime where the only route to a captain's seat was if you had the same DNA as the existing captain was thoroughly corrupt.
You won't get a pilot's job in SA if you're not an SA citizen. Period. Colour of skin doesn't come into it. This is because there will always be many more South Africans wanting to become pilots than there are vacancies.
Anyway I wish you the best of luck with whatever route you choose. Just be careful of SA schools that seem to be offering you the moon.
NS
PS check your PMs also