There are no end of round trip efficiency reminders to the UK government this week, on the news that it plans to push hydrogen into the existing gas pipelines by 2025. A newspaper item in the UK’s Telegraph has all the usual anti-hydrogen slurs as comments, including the famous “it’s against the laws of physics,” comment, but in truth what it plans is understandable if unworkable because the UK has a special gas problem. Some 85% of UK homes are connected to the gas mains, and most of these use the gas both for cooking and for home heat. Ambitious politicians have embraced a Hydrogen Strategy, which includes a variety of uses of hydrogen, but with only 10 MW of…