Russia carried out its largest air strike on Ukraine's energy system since its invasion in February 2022, damaging power units at a dam and causing blackouts for more than a million people
Many people got out their cameras to photograph and video the electrical storm on Saturday, which was called "utterly insane" and "like being under a strobe light".
Others remarked that they had "never seen a storm quite like this" and said the flashes were "stunning".
The lightning strikes were followed by thunderstorms and torrential rains.
The thunderstorms swept northwards across the south of England, the Midlands and Wales and are expected to continue throughout Sunday and continue into the early hours of Monday, according to the Met Office.
It has issued a yellow warning for heavy rain and flooding.