Thin? understatment of the minute I feel! Thanks for the link - the Mrs was going to point me to it.
Love this one:-
For small systems, prices are highly site specific - and can vary from 3 to 10,000 £/kW - source - (16) based on "discussions with mill owners in the south west"
So - they asked a load of half p*ssed on cider mill owners (like me

) about ground works. They will probably have most of the works in place. Um - how is that supposed to cover the costs of hydro?

ranting will ensue!