

Britain pioneers alternative power storage methods, particularly pumped hydro, and invests heavily in wind farms, diversifying the grid. So, at the end of the day, they don’t need backup power all that much.
Rooftop solar is routinely connected to the grid - no need to build redundant and expensive battery banks for every home, but the power is produced locally, minimizing transmission losses and strain on the power lines.
Nuclear, on its hand, is nice, but simply too expensive to build nowadays. Nuclear plants take a lot of time to pay off, so running existing plants is good, but building new ones can be a worse option overall.
Nice as a starting point, but not enough features to make it worth it for advanced setups.