Answer
Udham Singh's remains were repatriated to India by Zail Singh, Then President of India, on July 31, 1974, from the United Kingdom. Udham Singh was an Indian revolutionary who assassinated Michael O'Dwyer, the former Lieutenant Governor of Punjab, in 1940 to avenge the Jallianwala Bagh massacre. Singh was executed in 1940 and his remains were buried in Pentonville Prison Cemetery in London.