How do I reach these walls?

[stealthwolf]

I’m trying to remove wallpaper and then hopefully get a professional in to skim and paint.

How do I reach the walls around the staircase? My ladders (6ft) aren’t long enough.

 

[Old Salt]

Ladder held against the stair tread as a support with a scaffold plank. Step ladder on the landing with scaffold planks across to the window cill. Get a longer ladder, use a scraper attached to an extension pole.