Yorkiegirl, it is very good of you to post this. My parents were married , but passed away when I was 6. My mum when through hell afterwards with funeral bills and trying to claim benfits, when all she really should have been doing is looking after herself and me.
My dad paid in to a life insurance policy and when he died (back in 1981)it was realised that this meant we as a family, mum and me were £1 over the poverty line and therefore not entitled to any kind of benfit. I am glad things have changed.
Incidently I am married, and after marriage you should also sort out a will together, especially if you have children. Things dont automatically go to them or your other family members if you both die, but go to the state instead!