Hi, Thought I'd start this thread to add my experiences of trying to find a vegan energy supplier particularly in using vegan gas rather than bio-gas. I live in London and was recently looking at switching energy suppliers so I emailed a few of them. Here are various responses. Bulb They do not use vegan gas. There is an interesting thread on the bulb forum regarding this Ecotricity They advertise that they supply fully vegan energy Green Star Energy Loco2 M&S Energy No response Octopus I went with Octopus in the end (their green tariff) but will swap if they do start to use non-vegan gas. Hope this helps someone and it would be interesting if anyone can add others I've obviously missed and add their experences.