I'm currently 34 weeks pg with ds2 and am going for a vbac.
You cannot be forced into having a C Section if you don't want one, but conversely, you can usually opt for an elective if you want one.
There's an awful lot of talk of being "allowed" to do certain things - but tbh the choice of where and how you deliver is yours ... the HPs can advise certain courses of action, but you don't have to take that course of action if you don't agree with it!
For instance, if you do go for a vbac, you will be advised to go for a very medicalised birth, with cefm, time limits on labour etc., (I was), but I have done what's called "declined" the cpackage of care offred to vbac women, and am booked into the MLU of our local hospital, and am going to labour in water. It's taken a lot of effort to get to this stage, and every now and then I have a little wobble, and feel like an elective would be easier, but in my heart of hearts I know that I can do this ...
If you do decide to go for a vbac, then there's a really good support group here ... there's also lots of lovely ladies who will point you in the right direction.
Good luck with ttc!