Sorry for the long, upcoming post and also if I've posted this in the wrong section.
I currently work for a small but very lovely company. I've been looking at the employee handbook for their policy on maternity leave but it's literally 10 years out of date. I approached my boss about it and he said I was the first pregnant employee they've had since 2006 (I told you it was small company!). I asked if the policy will be updated so I know where I stand and we're all on the same page and he said it would get done but didn't know when. Things move at a slower than average pace around here so I'm not banking on it being done before my maternity leave starts in March... Also, we don't have a HR department as such.
Could this come back to bite me in anyway? I know where I stand legally in terms of what minimum maternity leave and money I'm entitled to but could they argue and try to give me the lesser, outdated amount stated in their 'current' policy? I don't think they would do that to me but I want to be sure I can argue the toss with them if it came to it.
Also, when I handed my MAT B1 form to my boss he asked if that was the form that made my pregnancy 'official'?
I said it's been official for the last 23 weeks - that form just allows you to sort my maternity pay. He then asked me how much that was and what my company owner had agreed, but I've never been approached about it, or in fact, anything to do with my pregnancy. It's like they've been refusing to acknowledge it's happening. My burgeoning bump says otherwise! 
What do I do? Can I force them to sort their policy out in good time and do some research of their own? Or am I well enough protected by law that I can just let them keep ignoring it and let them worry about their responsibilities to me once I've gone on my leave?