Prince Alemayehu was taken to Britain aged seven in the 19th Century and died an orphan there 11 years later.
He is buried in the catacombs of a chapel in Windsor Castle and the Ethiopian royal descendants have long asked for the body's return.
Buckingham Palace has declined a fresh request for the restitution of the corpse saying it would disrupt the remains of others.
Produced by Kalkidan Yibeltal , Jibat Tamirat and Amensisa Ifa.
Source: BBC