Exactly England win was total shock and their batting was exceptional. Jofra Archer was in good form whose four wickets completely stopped South Africa and Jos Buttler aggressive play set strong tone for team. England players handled pressure much better than South Africa bowlers leading to huge 342 runs victory. This was powerful win which have helped England team to avoid losing series completely means they did not lose with 3-0 and it will give them much of confidence going forward.
Yes, that is exactly what happened because their poor batting was showing their defeat. England's brilliant bowler Farrukh's bowling helped them come back for the win but the SA batsmen's hard work did not improve. Jos Buttler's determination was motivating the SA players to win the match. The pressure on the SA batsmen, with his continuous efforts and hard work, he made this match a mark of joy and success by winning it by 342 runs. This win is showing their luck for England because if they did not win, it would have been a great pity for them.