Sorry to be so dumb about this. My husband recently left after a very long marriage and is now living with another woman. Does that make me legally separated, or do I need some kind of legal document? It's only really occurred to me because I want to remove him from my private health plan. I don't want to pay money to a solicitor to declare me separated, as just waiting until the plan comes up for renewal would cost less. But it did occur to me that there may be other things where I need a "separated" status. Any advice gratefully received!