Southeastern: Woolwich Line, Bexleyheath Line And

Hi guys today I’m thinking of suggesting an extension for the Southeastern in TSW 3.

 

I know nothing about the lines. Could you explain? Length, stations, rolling stock, why it should be extended. Don't link a wikipedia article but explain why you want this

 

No thank you. Anything modern southeastern 3rd rail should be avoided by developers like a plague for at least another year or two, though preferably more.