[...]A 1 GW power plant operating continuously produces 24 GWh/day.

Makes much more sense, thank you.

So for visualization, with our very rough numbers:

3.390 Thash/s = [...] = 81.36 MWh/day

and

Ratcliffe-on-Soar power station is a coal-fired power station [with] a [peak] capacity of 2,000 MW or 48,000 MWh/day

So 81.36/48000 = 0.001695 or 0.17% of this:

or breaking it into renewable units:

wikipedia says: "The power generated by a large wind turbine is of the order of 1 or 2 megawatts."

so 24-48 MWh/day, or 2-4 of these:

Which seems pretty minor, all told. Does anyone have any interesting pictures of data centers with their known power usage? Or tighten up the numbers?