What is the time difference between India and England?

England (London) is at (Greenwich Mean Time) GMT.

India is (Greenwich Mean Time) GMT +5.5 hours, ie. 5.5 hours ahead of Greenwich, England.

England is 5.5 hours behind India. (Daylight savings not taken into account.)

Between the last Sunday of March and the last Sunday of October, India is 4.5 hours ahead of England. During that time, when it's 5:30 PM IST in India, it's 1 PM BST in England.