Fuel delivery spout for avoiding misfuelling and method therefor

Apparatus for preventing an undesirable fluid from flowing into a fuel receiving inlet of a fuel storage tank, comprising:

• a fluid inlet for receiving fluid from a fluid source, a fluid outlet and a conduit disposed therebetween;
• a sensor within the conduit configured to provide an output indicative of a type of fluid in the conduit;
• a valve selectively operable to prevent or allow flow of fluid through the conduit from the fluid inlet to the fluid outlet;
• a controller configured to automatically cause the valve to prevent or allow flow of fluid through the conduit in dependence on the output of the sensor and permitted fluid information, the permitted fluid information being information indicative of a type of fluid that is to be permitted to flow through the conduit;
• and
• an electrical generator configured to generate electrical power to charge a charge storage device in response to flow of fluid through the apparatus during an operation in which fluid flows from the fluid inlet to the fluid outlet via the conduit, the charge storage device being arranged to provide a supply of electrical power to the valve and controller of the apparatus,
• wherein the apparatus is portable, and wherein the apparatus comprises a connector that is adjacent the fluid outlet and that is configured to detachably couple to an inlet of the fuel storage tank.