Safety measures to prevent passengers falling on the lines are to be installed at Wimbledon station.
The news comes a week after the Royal Courts of Justice heard two inquests into Gerard Naughton, 58, and Leon Blanchard, 21, both tragically killed when they were struck by trains at Wimbledon station late last year.
The coroner ruled both men took their own lives whilst the balance of their minds were disturbed.
Work has begun on platforms six and seven, which run adjacent to tracks typically carrying fast trains not stopping, to install safety fencing ‘to restrict passenger access to those platforms when trains are passing through the station without stopping.’
A spokesperson for the South West Trains-Network Rail Alliance (SWTNRA) said when the platforms are in use they will be accessed by sliding gates.
Angela Hodes, assistant coroner for Westminster Coroner's Court, heard how Mr Naughton, from Putney, arrived at the station at 1.42pm on Saturday, October 5, and went towards platforms seven.
At the hearing, detective sergeant Danny Stockdale said: "The barriers were open when he was coming through.
"Platform seven tends to be where the non-stopping trains run through."
DS Stockdale said Mr Naughton jumped within 90 seconds of entering the station.
Work to improve the platforms is expected to take about three months.
The SWTNRA spokesperson said it is also removing equipment from platforms six and seven including the removal buildings, the phone booths, the vending machines and some advertising boards to ensure station staff have a clear view of the full length of each platform.
A new waiting room is being constructed on platforms seven and eight and the Starbucks at the station will be re-positioned near to the new waiting room.
The customer information screens are also being repositioned to help prevent crowding at the foot of the stairs, particularly on platform eight.
At Earlsfield station, equipment is being removed from platforms one and two, and safety fencing is being installed along platform one.
A new platform building will be installed which will include a small retail unit, a staff facility and a disabled toilet.
To ease congestion on the stairs, the customer information screens are also being relocated further along platform one.
The spokesperson said: "Safety is our absolute priority.
"We have worked closely with the Network Rail safety team and believe that these measures - which are also in place at other UK train stations - will help make both stations even safer for the thousands of customers who use them every day."