I know of women who have - both publically and privately. I think it may be harder in a public hospital if you have no *real* reason for one kwim, but I think considering your situation that they would probably do it.
Thanks Trillian. I'm seeing my MW tomorrow and want to have an honest chat about it. I know there are dangers, increased risk of instrumental delivery, emergency cs, greater use of pain relief. But if birth causes me to "break" I'm going to be an awful mum.

Thanks for all the help guys, I'll let you know.