Thanks for replying Ethan.
I understand what you mean about the number of corners - I suppose my bass traps will cover 3 of the 12 and a portable stand will go some way to sorting out another.
I won't be able to tackle the floor to wall corners and there isn't really enough space above the window and cupboard/entrance to put traps on those wall to ceiling corners. That leaves me with the wall to ceiling corners on the longer walls which I could try to tackle - would panels straddling these corners help even if they only covered, for example, half the length of the room? I'm concerned that as the ceiling is pretty low, it could be a problem to have a trap covering the full length of the room on the longest wall (due to the position of the door).
Do you think that only tackling half the corners in the room is going to be a significant problem?
Am I right to think that it'll be more important to use space in this room for traps rather than introducing additional acoustic components like diffusers too?
Apologies if some of this info is a bit basic - just trying to get my head around acoustics.
Thanks again.
Andy