On Sep 20, 10:16*pm, Tim Streater wrote:
In article
,

*harry wrote:
So the new energy system has to be subsidised. The theory is that by
2020 parity in fuel costs will be achieved. After that renewable
energies will be cheaper.

It's actually a hypothesis, not a theory, but leaving that side, perhaps
you'd like to tell us what this hypothesis is *based* on.

It is a DECC thing.