Miskate, if you're worried you could try calling Maternity Action for clarity? They should be able to help you out with what you would be entitled to etc. so you can feel a bit more prepared, even though it might not happen.
Wahoo, what a relief for you, ladydolly! What a lovely and timely windfall 
Greenstone, first baby for me but had a rage-inducing moment at the weekend. I am still pretty small bump-wise and have had several comments about how people wouldn't even know I was pg etc etc. (Cue gritted teeth and forced smiling.) Was gobsmacked to walk into the shop at the weekend and have DP's lady manager turn around and go, 'Oh my God, you're massive. Are you sure it's not twins? You look huge! Welcome to the club, fatty!'
I was utterly speechless! I don't know if it's because I'm naturally slender and she's just a jealous cow, but what a thing to say! I pointed out to DP afterwards that she was lucky to still have all her teeth after that. I just turned and walked out, but ARGH!
So yeah. Rage. In fact, am going to have to make a cup of tea now as even thinking about it is raising my BP alarmingly.