Trains came to a standstill earlier this morning after a person collapsed while travelling through Wimbledon station.
National Rail has reported delays of about 20 minutes for all services travelling through Wimbledon to Waterloo after the person was taken ill at about 8.40am.
South West Trains, the company which runs the mainline trains on that route, said the incident would have a knock-on effect to services until 10.30am.
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