Rakeem Miles, 23, of East Street in Southwark was convicted of manslaughter at Inner London crown Court on March 21.
The conviction follows an investigation by the British Transport Police into the death of 28-year-old Samuel Winter in August 2024.
The court heard how Samuel arrived at the station at around 9.30pm on August 22 last year, after travelling on the eastbound jubilee line.
As Samuel exited the station and made his way up the escalator, it is understood that he brushed past the 23-year-old.
Miles reached for Samuel, who had continued on his way whilst Miles remained in the same spot.
Miles followed the 28-year-old through the ticket barriers and headed out of the exit stairs, shouting after him.
He reached out again, grabbing him from behind and ripping his top as he pulled Samuel to face him.
He issued a single punch to Samuel’s head, which left him collapsed on the stairs.
Paramedics were dispatched to the scene where Samuel was given CPR before being taken to hospital suffering a critical brain injury.
When officers visited the shop on the morning of August 23, they discovered that Miles had just left.
The 23-year-old was arrested outside on suspicion of Grievous Bodily Harm.
Samuel died in the hospital the following day surrounded by his family.
His family said: “We have lost our gentle, hugely compassionate, funny, intelligent and hard-working son Sam because of this entirely unprovoked and horrific assault.
“We would do anything and give everything to have Sam back with us. But he’s gone for the rest of our lives.
“The pain of his loss is almost unbearable for us, his wider family, many friends and all the people in his community, whom he loved to help through his physiotherapy, service and personal generosity.”
They thanked the British Transport Police and Crown Prosecution Service, adding that the “verdict isn’t a pleasure” and they have “unconditionally forgiven” Miles.
Det Chf Insp Paul Attwell said: “This was a truly tragic incident where one person’s actions and one punch has changed the lives of Samuel’s family forever.
“Samuel’s family described him as gentle and kind, and he will be sorely missed by all those who love him. I hope this outcome helps to bring them some peace and we reiterate our requests to give the family privacy at such a difficult time.
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“It only took one punch from Miles to end Samuel’s life and forever change the lives of those around him. He showed no remorse for his action, leaving Samuel at the station and continuing on with his evening.
“The quick-time and thorough investigation by the teams involved meant Miles was identified and apprehended quickly. There is zero tolerance for violence on the railway and I’m glad to see this conviction.”
A sentencing date has been set for May 8 at Inner London Crown Court.
