Lorry driver or Brain surgeon, he/she who leaves the ground with too little fuel to get to his/her destination has made a mistake, not a small forgivable mistake, but a HUGE and unforgivable one, if the said Lorry driver or Brain Surgeon has not the ability to work out his fuel load and then DOUBLE check the tanks, then sorry, Unforgivable Mistake, do not pass go without paying severe funds to Mr Blair, or John Prescott(whoevers turn it is this week)