It's not right to pressure Windsor Castle on this matter, as there's a valid reason to continue to hold Prince Alemayehu's remains in the UK. While it's tragic that he was dislocated from Ethiopia and there is a case for his repatriation, identifying and exhuming the prince wouldn't be possible as there are dozens of bodies buried in the catacombs.
Though the logistics of exhuming the remains are complex, it's unfair to keep Prince Alemayehu's body in a foreign country as his rightful resting place is next to his father in Ethiopia. Moreover, the UK — which also plundered Ethiopia to steal its gold, jewelry, and exotic animals — can use this moment to atone for its imperial past and diplomatic blunder by sending the prince's body back to where it belongs.