Jos Buttler was left bristling and bemused as a controversial concussion sub helped India take an unassailable 3-1 lead in an entertaining T20 series.

Batting all-rounder Shivam Dube struck 53 off 34 balls before going off the field with a concussion; pace bowler Harshit Rana took his place and claimed three wickets to fire India to victory over England in fourth T20;