I've been listening to that book too Surfbee--I love it as well.
I'm glad you are looking into your legal rights--I'm curious if how child support works in the UK?
In the U.S., if you name the father or get DNA test, they are legally obliged to contribute financially and can have wages garnered, etc. though enforcement for the unwilling can be very difficult.
It's great you have forgiven each other. Have you discussed this aspect yet? It might be something you want to get in place legally before the birth so you aren't struggling financially and can be calm and stay home with the baby for awhile.