Can anyone tell me what tool you can use to adjust the handbrake cable nut?
I can't get hold of it with a spanner as the exhaust limits the movement.

 

Ok that would be a box spanner!

 

i'd the same problem and i used a bone key for bicycles with different size on it (it doesnt cost a lot). if you don't see what i mean, tell me and i'd try to show you a picture. ( if you search for "dog bone bicycle" on your browser you'd see it)

 

Yup that would work. Box spanner is really easy too if you are going to purchase.