This sketch was originally transmitted as part of the TV show Shoot The Writers! on ITV1 on the night of 23 September 2004. Words and the punchline, and indeed the context of the joke were changed.
The sketch as originally written is reproduced here.
© Steve England & Frances Jordan, 2004.

Sketch: 4x4

WE SEE A 4X4 DRIVING ACROSS ROUGH TERRAIN.

THROUGH VARIOUS CUTS/EDITS WE SEE IT CLIMB A STEEP HILL, DRIVE THROUGH A SHALLOW LAKE, MANOEUVRE AROUND A BUNKER ETC THIS MONTAGE LASTS A CONSIDERABLE TIME COVERING SOME EXTREMELY HAIR-RAISING AND DANGEROUS MOVES.

EVENTUALLY THE VEHICLE COMES TO A HALT AND TWO PEOPLE STEP OUT. A TIMID HOUSEWIFE AND A BURLY GENT DRESSED IN DESIGNER SUIT.

MAN:

So what do you think madam? Are you interested?

WOMAN:

I just wanted to know if it's any good for taking the kids to school.