A few weeks ago I was looking at presentation notes on adding bio-gas to the domestic gas mix with the fossil fuel natural gas.
And recently spotted offer Ecotricity:
While I think bio-gas may only make a small contribution it will be interesting to see how develops.
New supplies of Natural Gas from shale gas which has become accessible are pushing down gas prices in UK due to world market in LNG.
which fits in with what was in book The Grand Energy Transition by Robert A. Hefner III mentioned in previous energy post.