With my first I had a show and started to feel uncomfortable at 2:30am and had him at 9:29am, so 7hrs. Although in my notes my labour is down as 4 hrs 30 mins as my waters broke at 5am and I only had painful contractions from when my membranes ruptured.
With my second I was having contractions from 9:30 am ish but couldn't feel them really (I only knew because I was having a CTG)...I started feeling contrations from 10:45am, waters broke at 12:10pm and I had her at 12:45pm, so 2hrs.