I'm glad that you've got the MW onside now, makes it much less stressful.
I'm Cambs aswell.
Have you faced more issues due to previous section? (If you dont mind me asking was it elective? Or emergency)
I had EMCS last time - failure to wait and back to back baby.
I in all honesty did not have to fight and had a very easy ride planning my HB...despite a very unsupportive husband who said no way jose to a birth pool!
I told my ME at booking I wanted to HB and both of them were more than supportive they were wonderful. 1 even said I would get better care and she applauded what I was doing.
Yes the OB was a scaremonger and not helpful so under the suggestion of my MW didnt bother going back to see them as my pregnancy was uncomplicated.
I went on to labour at home incredibly well and was 7/8cm by the time the MW arrived with no pain relief except a bath and breathing, got to 10cm with GnA but had to transfer as there wee blood loss concerns - a decent enough reason to transfer given my previous CS...but thankfully avoid the intervention train and birthed my DS2 a little later with only the GnA.
Just because you plan an HBAC doesnt mean you'll have a hard time getting or trying it...but be prepared you might do.
I found out that I may not have had to fight but being prepared to do so empowered me A LOT, having so much information at my fingertips about pregnancy, labour, birth and how it could and should happen, the laws and my rights allowed me to make even my transfer a good....no great experience.