All three are out of the question, either by cost, as in the case of photovoltaic. Lack of resource, in the case of the wind turbine, and the sheer impracticality of building a nuclear reactor in the garden shed. (I think it’s not allowed due to the council byelaws).
Yes I know some commenters have explored harnessing the tidal power of the toilet but trying to fit a generator in the U bend could cause problems.
So what next?
Wood burning stove?
Fiddling the meter?