England capitulated on the fifth morning at Centurion as Kagiso Rabada inspired South Africa to a commanding consolation victory in the fourth Test.
The Proteas took seven wickets for just 49 runs in little more than an hour's play, sealing a 280-run success as the series ended 2-1 to the tourists.
Twenty-year-old Rabada was again the star, taking six for 32 to finish with 13 wickets in the match, but England were at least partial authors of their own downfall.
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