OK thanks
This is what I have added to the local.config
# Fuel info
/* Default fuel price, for airports that don't have
And the surcharge percentage. View the docs
for more details about these
*/
Config::Set('FUEL_DEFAULT_PRICE', '5.10');
Config::Set('FUEL_SURCHARGE', '5');
Config::Set('FUEL_GET_LIVE_PRICE', true);