Rick wrote:


I'd look for a diesel generator, and a farmer (or other) that can
supply red diesel.

Yes; no legal requirement to pay excise duty unless the fuel is used in
a vehicle on the public roads. A diesel generator set could run on
gas-oil heating fuel, or red diesel sold for construction, agriculture
or boats. An oil supplier would sell it by the drum, but expect a
follow-up visit from HM Customs & Excise to test any diesel vehicles
you're running.

I think you'd need a lot of batteries to run a mixer for a day. I
wouldn't fancy humping round plastic batteries full of lead and
sulphuric acid.