Re: @ bazza (@TechnicalBen)
"...4 years seems more than enough to get some increase in grid capacity..."
Some maybe, in special cases or in countries where some mandarin comes and just makes land owner sign off the deal or else. Certainly not in Europe, with property transactions, EIA processes, pressure groups negotiations and so on and on taking years. I guess it's the same all over (democratic) world.
In the free world you have to take into account the fact that despite everyone agrees on some infrastructure being necessary, no one wants it in their backyard. And if they agree, they usually want something for it and on top some concessions that take time to negotiate. Sorry if it sounds patronising (that's not the intention), but I really want to show that things really do take time, often longer that people appreciate.
As a side note - I don't believe in biodiesel (unless from food production waste, which is only miniscule amount). It is more damaging to the environment than the normal one. It results in destroyed soil, erosion, requires massive amount of fertilisers. This is a brutal, dirty business violating nature. Actually, top soil would need many decades to naturally recover from such (ab)use.