What is the purpose of pre-school?

[FeelingLucky]

DD only 14 months so a way to go yet.
Have heard people talk about pre-school (which the government pays for?) but I'm not quite sure what it is. I also understand that it is for learning and follows a curriculum?

Sorry for my ignorance, but would really appreciate it if someone can explain it all in non-government jargon.
We're going to look at a daycare nursery in the next couple of weeks which has a pre-school and would really like to know what to look for.
Also, when I look at OFSTED reports, does nursery mean the same as pre-school?

Thanks everyone.
lilmissmummy - yes very helpful. My DD seems to like routine and structure too.

www.youtube.com/watch?v=nmheYO0Z72o&eurl=openeyecampaign.wordpress.com/2008/07/23/eyfs-too-mu ch-too-soon-eyfs-exemptions-too-little-too-late/

Very interesting link Mrz, thanks

Very useful, thank you!!