Do you mean the short knee walls? If so, then no.

I believe you are talking about "knee walls", short walls to frame an upright wall. They are not normally load bearing but may help support a long roof joist.

Thanks.the walls ,one is the back of walk in wardrobe its height is 60 inches high,and as the roof comes down it is sitting on this wall .and then onto the outside wall.then further along the wall is the ensuite same thing

Thank you.angle of roof sits on these wall then onto outside wall

Outside wall bears the roof. These are just filler pieces to support the knee wall and to give you a nailing surface.

Well done thank you.1 more question,similar along the same wall the ensuite is backed on to this wall I want to break into the crawl space by knocking through the wall.so there should be no probs with it not being loadbearing?

Should be no problem. However, leave the angled top plate, it adds a little support.