I've always had a problem keeping awake on motorways, especially the five hour drive back home from visiting my parents. Because a large amount of it is on the M4 it is necessary to drive very very fast, and falling asleep while doing so often seems unwise.

The *only* thing that can keep me awake is spoken word, which I discovered last time I made the trip. Music sends me straight to sleep, especially if it has a strong bass line; extremely loud music with the windows open only works for a few minutes; and I now have such a strong association between being tired and drinking Red Bull that it sends me straight to sleep.

Unfortunately I'm rapidly running out of spoken material, and may have to raid Mike's collection of Radio 4 comedy once again. If I'm ever faced with the choice of risking death at the wheel or listening to Harry Potter I really don't know which I would choose..

Rob