Two men aged 19 and 21 have been remanded in police custody.
The 20-year-old died at Hillingdon Underground station.
Death on Hillingdon station platform after "altercation" with group of young men, police say.
The Prince of Wales and the Duchess of Cornwall recently visited my old secondary school Uxbridge High. It was to mark the 10 year anniversary of the charity Teach First, which the Prince is patron of.