Agree with Eleusis' comments. Do what you think is best for YOU! and don't allow anybody to make you feel guilty for your decisions. You never know what will happen..things will probably be fine, but the NHS and midwives should tell the TRUTH of what can happen...not to scare anybody, but to keep them informed. Also, don't think of this as 'either/or'...necessarily...maybe you can go into labor naturally and then have a c-section...I don't know how this happens here, but in the US it's a possibility, or at least you can obtain clarification on what would constiture a section after labor begins, or when is the point that you've labored too long..read my situation below
As for me, I had no problems in pregnancy at all, was fit and have climbed major mountains in this world, and I'd gladly climb Mt. Whitney several times in a row before I ever gave birth again...but this is just me...don't listen to horror stories and mine isn't one because we all came out okay, and I'm completely fine now...no problems at all. My problem in labor was that it just went on and on...the midwives just waited and waited on and on..and on and on...and I became severely exhausted and dehydrated in the end. That was the worst part of it for me and they blamed my problems first on the fact that I couldn't eat or drink anything ..well I'd gone nearly two days without, and I couldn't help it. Then of course it was 'my' fault labor wasn't progressing faster because I'd had an epidural.
I had a third degree tear and another internal tear and recovery was horrible, and I'll spend the rest of my life wishing I would have had a c-section...not an elective one, but I should have had a section after nearly 4 days of labor...I was severely dehydrated after I had DD and lost a lot of blood and she finally had to be delivered by forceps because she was stuck and face up...I was white as a ghost for weeks because of the blood loss. Everything is fine now...DD was completly fine, but I hate to think what would have happened had she not been since she spent so much more time in the birth canal than she should have. In fact, the midwives only 'woke up' to my delimma when my blood pressure became extremely high...at first they said well it's high because you're over 40, but DH pointed out that it was completley normal the day before I went into labor.
Ironically, all the people I know who had c-sections were in much better shape than I was in afterwards, but it's interesting that so many feel like they were 'cheated'..this is sad.
Don't just abide by the 'can't drive for 6 weeks rule'...I think that is just threats and propaganda by the NHS establishment...you'll be able to drive when YOU are able to safely drive...which will probably be nowhere near the 6 weeks, but could be later too I suppose.
Go with what you feel is best. Most labors are straightforward, and most sections aren't as bad as you've heard. I think the worst situation is to have to have an emergency section after laboring for hours, so maybe it's best I didn't have one...who knows...
On thing is for sure...labor will end at some point. Good luck and get all the facts that you can.