The Sky News piece on HVS new hydrogen trucks was very interesting but did not mention that Green Hydrogen will be cheaper than diesel and much more economic than National Grid electric battery charging. Commenting articles suggest 'batteries would need 10.6 GW of electricity - roughly the output of 900 large offshore wind turbines. But a switch to hydrogen would need 35.6GW of electricity to make it - requiring more than three times as many turbines'. This is total garbage because it is based on the concept of 'vehicle efficiency' which is wrong. There is no doubt that hydrogen heavy vehicles will beat batteries because hydrogen storage is way cheaper and ten times less weight. Also refill in 15 minutes, not 5 hours.Vehicle efficiency does not exist (see several K Kendall papers) because the key test is a range measurement, not an efficiency test. How many km does the vehicle do per MWh of energy? That is nothing to do with efficiency.