Criteria for being classed as single if still living together?

[LimeSlice]

Should probably also mention that I think have an actual plan for physical separation would help = knowing which of you is moving, a plan or goal on when. It is not a permanent arrangement, so if you can say this will be for x length of time, until whomever moves out, or is in a financial position to move out, then that definitely make it less likely CL will be on your back.

[Starfish]

Thanks for your replies everyone. It is all really helpful.
Lenny - You're absolutely right - we do have a relationship of sorts and are trying to work out what to do about it, as whatever we have is definitely not working. I didn't mean to imply that I want to apply for separated status right now, I am just looking at what options I have.