Hi Lizardqueenie we moved form a nice part of North London to a village about an hour out of London, 5 months ago.
So far its been very up and down, to start with I thought I'd made a big mistake but now I'm getting used to it.
Things I've learnt so far...
Driving - you need to drive everywhere, its expensive but the roads are quiet after London. If you live in a village there may not be any/many buses so your children will not get far on their own and you will be a taxi service.
People may not be quite as open-minded as you are used to, there may not be the same level of understanding/tolerance to difference/colour/ethnic origin as you are used to, I realise this sounds like a sweeping generalisation and I'm not trying to provoke anything, but I was so used to thinking live and let live, that I have been quite shocked at how openly some people express their views about things like immigration, but that may also be because where I previously lived was very PC.
The shops are so much quieter it makes shopping a joy again, the pubs are quieter and its just more relaxed.
Generally people are very friendly and if you show willingness to get involved in things you will make new friends.
As your child is so young you have the advantage of still having the primary school years and that means that you will make new friends easily at school.
I had been in London a long time so this was a big move, I realise their is lots going on outside of London, sounds obvious I know but when you are living in London its easy to dismiss the rest of the country as you don't often leave.
The countryside is lovely, constantly changing and full of life, I love my dog walks although we don't see many other dogs which is very different from London.
We also want to live by the sea in the long run, now I have made the move from London I feel free to go anywhere, so once my DCs finish school I think we will move again, hopefully to the sea.
I really, really miss my friends, but with effort on my part and theirs, I still see them as much as I can, I now have lovely sleepovers in London and I really look forward to going to London now.
It's not been an easy move for me but in the long run I think it will prove to be a good one.
Anyway, I hope its given you some food for thought, good luck with you decision.