Fuel protests

OK so I don't own a car, so I'm probably not the best person to comment on the fuel price protests but hey this is my blog an I'll comment on it if I want to.
The BBC ran a story today about the hauliers who decided to protest about the rising cost in diesel pointing out that a weeks fuel is now running at around £1,000. The lorry drivers all met at pre-arranged spots and drove in convoy towards central London, no doubt causing 'travel chaos'.
Now none of that particularly bothers me. We live in a free(ish) country where it is our right to voice an opinion, so fair enough, it's a good way of bringing the issue to everyone's attention.
What did amuse me, though, was the fact that hauliers "had driven from as far as Cornwall" to join the protest. So how much did that cost in fuel? Surely it would have been more economical to have all come up to London on the bus and then taken to the streets. I know, I know I'm being flippant but hey I'm not protesting about how much fuel costs.