Darren Mitchell was found dead at the Abercorn Barracks in Ballykilner, Northern Ireland.
A Police Service of Northern Ireland spokesman said: We were alerted to the death of a 20 year old man on Sunday.
"We are not treating the death as suspicious.
On Twitter, friends were posting tributes on Tuesday afternoon. Zoe Watts wrote: " R.I.P Darren MItchell [our] hero! Sweet dreams and god bless."
And Mike Carter posted: "Rest in peace Darren Mitchell, was always a pleasure. Find happiness up there dude."
If you would like to pay tribute to Darren, contact the newsdesk: editorialuxbridge@trinitysouth.co.uk or via Facebook, facebook.com/uxbridgegazette or tweet us @uxbridgegazette
