I haven't watched the programme yet but I recently gave birth to my second baby using natal hypnotherapy, homebirth in a pool, with a doula.
It worked extremely well, rather than pain I really could just feel the sensations of what was happening. Midwife arrived, said I was only 2cms then left an hour later saying I wasn't progressing (though didn't actually check). The contractions were coming thick and fast but I'd been curled up quietly on my side in bed, with the duvet over my head to ignore her chatting and the action going on with DH getting the pool filled. She told me the pool would slow things down.
Our other kids were waking so it was a good time to slow things, so I got in anyway, and gave birth 45 mins later before we could get the midwife back!
I thought I could feel dilation (but the midwife's declaration of no progress left me slightly doubting myself) and I did have a panic at transition, saying I couldn't do it any more when I knew really I just wanted to push.
Agree with comment on mature women as birth partners. My lovely doula (who's had 5 children herself) was very calming, and I got back in the zone very fast and had babe in arms (caught by DH!) minutes later.
It was a much better birth experience than my first. I never once even thought about asking for any other pain relief. And of DH's experience of five, this was by far the calmest and most relaxed.