England secured their first Test win since 2014 with a 286-run victory over South Africa in Bloemfontein.
Posting an improbable 351 win, the Proteas crumbled to 64, their lowest score in women’s Tests.
The standout for England was seamer Lauren Bell who took 4-27, while spinner Sophie Ecclestone finished with 2-7.
England started the day with a lead of 145 and were bowled out for 281 shortly before tea, with captain Heather Knight forming the backbone of the innings with a composed 90.
Facing a difficult situation 20 minutes before half-time, Bell scored a crucial goal from Laura Wolvaardt to take four points, while fellow netminder Lauren Filer trapped Anneke Bosch in front for the same result.
However, the turning point came after the break when England appealed for Annerie Dercksen to be caught short and the on-field umpire was initially unfazed.
However, the decision was subsequently overturned after consultation with the third referee, even though the Decision Review System (DRS) was not operational during the match.
South Africa were clearly unhappy with this decision and collapsed from there, losing their last seven wickets for just 42 runs, with Marizanne Kapp’s only contribution being 21.
The dismal batting performance overshadowed the brilliant bowling of Nonkululeko Mlaba, who took 6-67 and finished with 10 points.
The victory ensures England go into January’s Ashes in Australia with plenty of confidence, having also won both previous white-ball series on this tour.
