Audiences voted for their favourite films across 28 screenings during the fest.
Says Mehta, "I am thrilled that my passion project has won the award. The premiere at the Victoria & Albert Museum was wonderful and the interaction with London audiences was great. This award is the icing on the cake."
The film charts the life of the Indian artist Raja Ravi Varma (Randeep Hooda) and his his muse Sugandha (Nandana Sen).