That's ideal timing for a VBAC - rock up to hospital fully dilated and feeling ready to push. One way you can help figure out the timing is feel your own cervix when you're at home (as long as your waters have not broken prior to active labour starting.) You're just observing for changes. You'll find you can tell when your cervix is starting to open, when it's about half open and when it's hard to feel any cervix left at all ... but hey what's that furry walnut feel?? Izzat my baby's head??? Or you might feel something like a balloon in front of the hardness of your baby's head, which would be the forewaters. OK so NOW you're ready to go to hospital!

There's a good link here on doing your own vaginal checks called "It's Not Rocket Science"
Thanks Julie!!! I would never have considered checking my cervix whilst in labour. All this new info has got me excited! And more confident that I'll get my VBAC