England completed a 4-0 T20I series sweep over India with a 56-run win in Southampton. Jos Buttler smashed a career-best 131, while Harry Brook's unbeaten 95 helped England post 257/3 with a record 233-run stand. India replied with 201/8 despite half-centuries from Ishan Kishan and Tilak Varma, ending a disappointing tour on a losing note.