a straight flight of stairs rest on the trimmer at the very top of ur stairs this is located at the very last step of ur stairs. if ur stairs has a landing in the middle then turns back on itself, then u'll have a dwarf supporting wall underneath it.
if the wall u r talking about it directly below the string of ur stairs (the 250mm/300mm *32mm wide wood at the side) then it should be ok to remove it.
DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!