You never know with this place. Looking for someone to contact for work and this might beat speculative emails.

where in the country are you?
you making or buying?

I'm not at all involved, but know some people brewing/using the stuff

Newcastle,

Looking for biggish companies, not homebrew.

Sundance are a company in Pembrokeshire, SW Wales – know them through the National Park using them, our lease company won't warrant our vehicles on it though.

One friend has a commercial plant, using some of the farms oilseed rape to power everything plus some re-sale (Devon) and another mate with a ropey looking homebrew that has successfully powered builders wagons and taxis around the north for years

how big?

mate of mine runs a company that manufactures processors in the south east