Ladies, calling on your collective wisdoms (I'm having trouble doing searches in BB - internet plays up when I try)

What do I need to have in my nappy bag?

I get that there should be:
  • nappies (how many in general)
  • a wet bag - for the dirty ones
  • wipes of some sort (what do you recommend?)
  • change mat

What else should I have?
I intend at this stage to BF - so I don't think I will need bottles to worry about for a while (will have to express later for CC)