im 45 mins away from my nearest hospital too, planning another homebirth with number 2.
i had a home birth, and the NHS were fully supportive (due to being so far away, lots of women choose to home birth here)
Unless you have been sectioned for mental health anyone can CHOOSE a homebirth under NHS You can not be made to go to hospital, and a midwife is obliged to attend. (even if you are breach, have triplets, strep B etc etc, you CAN choose a home birth)
See if you have a homebirth support group locally
Take a look at the facebook page "home birthers and hopefuls" for support.
Im now pg with number 2 and definitely having another HB, last time i didnt know if i was or wasnt in labour when midwife popped in (I was 7cm) 20mins later DD was lieing uncaught over the sofa. midwife number 2 arrived after DD had been born
Having a planned home birth is very very safe for a low risk pregnancy, actually going to hospital increases the chance of you and / or baby dieing / major PP hemoarage / infection / intervention / birthing injuries / baby having a lower apgar score.
On the otherhand an unplanned unassisted birth in a car / road side is much much much more risky than any other place of birth, so at least by choosing to birth at home, should you need to go to hospital, you go via ambulence (ie much quicker than by car) and with a midwife, so you will NOT even take the risk of an unassisted birth at the road side.
Ultimately the decision is yours and only yours