Generally labours that are quick and result in "born before arrival" births are safe. If they had complications they would be longer labours IYKWIM. So if you are at home with a speedy labour then try to remember that.

I would chat to your hospital about tips for a born before arrival (unplanned home birth) and you can also look up information online for "emergency childbirth" online and I'm sure 000 would be able to talk your partner through what to do as it happens if necessary.

I wouldn't think there would be any need to clamp and cut the cord yourself-this doesn't have to be done quickly (or even at all).

I'm not sure what links are allowed these days but I think this one is okay as it's just info... a 38 page pdf on emergency childbirth.
http://www.umbrellanoize.com/stuff/E...Childbirth.pdf