> Let's compare UK and USA electricity prices.

The USA is a huge place with prices all over the map.

Here are PG&E electricity prices in California from my recent bill:

peak: 53.0 + 18.3 = 71.3 c/kWh

partpeak: 51.3 + 11.1 = 62.4 c/kWh

offpeak: 34.4 + 09.8 = 44.2 c/kWh