A man died after collapsing on a train at Ashford International, sparking a mass emergency response.
Police were called to the station just after 12pm on Saturday following reports of a man in his 40s having a heart attack.
An ambulance and fire engine were seen on the International side close to the Designer Outlet, as well as numerous police cars.
Ambulance spokesman Rich Airey said: "Crews in three cars and one ambulance attended the scene.
"Sadly, efforts to resuscitate the patient proved unsuccessful and the person was pronounced dead at the scene."
BTP said his family have been informed, and his death is not being treated as suspicious.
A Kent Fire and Rescue (KFRS) spokesman said: "KFRS assisted Kent Police and SECAmb paramedics at a medical incident in which KFRS crews provided screening to protect the dignity of a casualty.
The man died on the 10.32am Southern Railway service from Brighton to Ashford.
A spokesman for the rail operator said: "We are very sorry that the passenger who fell ill on a train approaching Ashford on Saturday did not recover, despite the rapid attendance of the emergency services.
"We would like to express our deepest sympathy to the passenger's family and friends, and our thanks to the police officers and ambulance crew for their efforts, and to our train crew and station staff who supported them."