Wombles as your incision is a classical scar I "think" they won't allow you a VBAC anyway due to the damage they would have done to your uterus.
I don't know how things stand now days, but my Mum had her c-sec and it was down the center of the stomach and then off to the left or right as well, she went on to have 3 vbac after this. There was a 7yr gap from that c-sec delivery to her vbac but she never had any probs through any of ehr 3 PG or Births.

Hope this is of some help and maybe encouragement that it can be done even with the old cut