well, as it were. so these things always have a double edge. things always have a double edae. ~ , ., things always have a double edie, . , ., ~ , things always have a double edue.~ , . ~ ,., things always have a double ede.; ,., ~ . edge. we shall keep a close e e. edge. we shall keep a close eye- thank edge. we shall keep a close eye. thank you edge. we shall keep a close eye. thank you for - edge. we shall keep a close eye. thank you for now. - uk food and drinks firms say they are concerned about supply shortages as a deal brokered by the government last year which ensured carbon dioxide supplies comes to an end. c02 is used in fizzy drinks, it s also used to keep packaged food fresh and to stun livestock before slaughter. the government stepped in to subsidise a major c02 producer in october after its shutdown due to high gas prices threatened food supplies. that arrangement ends on today, despite continuing high global demand for the gas. nick allen is chief executive of the