Its because the fast line platforms arent fenced off, used to happen a lot more in South London at stations like Streatham and Thornton Heath but since the fast lines were fenced off, there hasnt been many. However that cant really happen at Gatwick, Horley or Three Bridges.
Was expecting such posts on this topic saying its the TOCs fault - maybe go and visit the victims family and moan at them that they delayed people.
Also, a baby girl was born on a Southeastern London - Maidstone train last week, would you have gone and moaned at those people too for causing a...