I don't know if it's just a London thing, but this video clip titled Gap Yah really made me laugh. It completely takes the mickey out of the gap year and the whole class system.
A gap year tends to be teenagers going off to far flung places, with dosh given to them by their parents. Full moon parties and drunken raves are all part of the cultural gap year experience. When my 17 year old son talked about a gap year, I told him he has already had one; the first year of his A levels when he did bugger all.
If you have teenagers and live in certain parts of london, you will appreciate the Gap Yah.