To drive in the UK, you need to be 17 years or over.
You need to then ask for a provisional licence at the Post Office.
They give you a form, you fill it, and you have some new passport photos done.
You then give it back with a fee of like 40 quid or whatever it was and they send it off .
You are then, once recieving the licence able to start lessons, though you have to find your own instructor who is part of a driving school, but I don't think its anything like you have down there, as part of a grade or something.
My dad could for example teach me, BUT, I'm not insured with his car, so he's unable to.
My instructor just comes to my house at a prebooked date (Usually Wednesdays), and I drive, and drive myself back to my house after.
The Provisional doesn't allow you to practise driving on motorways, or drive on your own, and you must be accompined by someone over the age of 21, and has been driving for 3 or more years.
Once I pass my test, that licence will be upgraded to a full licence, which will permit me to drive on my own, and on motorways.
I'll probably do the Pass Plus scheme that comes after, which tests you on motorways, and as a result lowers your insurance premiums, since they will be expensive considering I'm young, and a starter driver.